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What are the functions of the Digestive Sytem
- Ingestion
- Digestion
- Absorption
- Movement/Mixing
- Elimination/Excretion
- Production
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eating, taking food in. starts at the mouth, teeth, tongue, saliva, chewing, swallowing is part of what function of the digestive system?
Ingestions
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breaking the food down is known as
digestion
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what are the 2 parts of digestion
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breaking down the food with teeth, tongue is
mechanical
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starts with saliva with the enzymes in the saliva and stomach acid is
chemical
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Diffusion, Active transport
-is the building blocks of food
-water, vitamins, minerals, alcohol, drugs, toxins
Absorption
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this process starts in the mouth, mixing the food and moving the food from mouth to the stomach
movement/mixing
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this process gets rid of food and gets rid of old blood cells, and what ever that doesnt get recycled.
Elimination/Excretion
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This processes produces some hormones and vitamins
Production
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deglutition is
swallowing
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Alimentary Canal is an aka for
gastrointestinal tract (GI tract)
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What are the accessory organs that are not part of the gastrointestinal tract (GI tract) or aka alimentary canal?
- Salivary glands
- Liver
- Gallbladder
- Pancreas
- Teeth
- Tongue
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What is the largest internal organ that is the main accessory organ?
Liver
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buccal cavity is an aka for
oral cavity
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Ingestion start at
- mouth (oral cavity aka buccal cavity)
- -lips
- -teeth
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this is known as baby teeth, milk teeth and how many teeths
- primary dentition has 20 teeth
- deciduous teeth
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this stage is the adult teeth and how many teeth in the adult stage
secondary dentition has 32 teeth
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name all 32 teeth of your adult teeth (secondary dentition)
- 8 incisors
- 4 canine
- 8 premolars
- 12 molars
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the cutting teeth are called
incisors (8)
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tearing teeth are called
canine (4)
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grinding teeth are called
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3rd molar is called
wisdom teeth
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After the 3rd molars (wisdom teeth) are removed we have how many teeths
28 teeth
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hardest type of bone on the the teeth is
enamel
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what is the function of the tongue when it comes to ingestion
smashing food and helps form a bolus and swallowing food
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bolus means
balls of food
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bumps on the tongue and contains taste buds are called
papillae
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what are the 3 salivary glands
- parotid salivary gland
- sublingual salivary gland
- submandibular salivary gland
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what is the largest salivary gland and is located on the cheek
parotid salivary gland
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this salivary gland is found under the tongue
sublingual salivary gland
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this salivary gland is under the tongue and on the back of the tongue
submandibular salivary glands
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what are the components of saliva
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what are the 2 lysozyme enzyme in saliva
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lysozyme enzyme in saliva that breaks fats down
lingual lipase
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lysozyme enzyme that breaks down starches
amylase
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what type of saliva is thinner like water
serous saliva
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what type of saliva is thicker and has proteins
mucous saliva
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what produces mucus
mucous membranes produce mucus
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salivary gland under the tongue, close to front of chin
sublingual
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salivary gland under the tongue located on the back of the tongue
submandibular
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largest salivary gland on cheek in front of ear
parotid
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what are the enzymes in the the mouth and saliva
- lingual lipase which breaks down fats
- salivary amalyse which breaks down starches
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GI Tract starts at the
- mouth (oral cavity)
- pharynx (oropharynx)
- Esophagus
- Stomach
- Small Intestine
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Starting with the mouth it begins with
- Teeth
- Tongue- taste buds
- Salivary glands
- uvula
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This structure in the oral cavity helps block food from getting into the nasal cavity
uvula
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pharynx (oropharynx) includes
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prevents you from choking and food getting into the lungs
epiglottis
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swallowing is
deglutition
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aka for pharynx
oropharynx
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lower part of pharynx is what type of muscles
smooth muscle and involuntary muscle
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this is the conscious and upper part of pharynx is made of what type of muscle
skeletal muscle and is voluntary
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wavelike contraction for movement through the GI tract and is made of smooth muscles this is called
peristalsis
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muscles that stays contracted all the time and only opens up to allow food to pass through and goes back to contracted state is a circular, muscle wich controls an opening this is called a
sphincter
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lower esophageal aka is
cardiac sphincter
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How many inches is the esophagus
12 inch tube
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The whole GI tract is made of what
mucous membrane
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mucous membrane has how many layers
4 layers
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what are the 4 layers of the mucous membrane?
- mucosa
- submucosa
- muscularis
- serosa
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this layer is thick and slick. made of mucous membrane. it is the inner most layer. produces mucus. most variable layer. digestion and absorbtion. protects from bacteria and infection.
mucosa
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what type of tissue is the mucous membrane made of
endothelium
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goblet cells are
single cell gland
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what layer is the most unique layer and why is it unique
the mucosa is the most unique layer because it changes the most in the digestive tract
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greater omentum
fat apron in front of our stomach
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this layer has glands, blood vessels, lymph vessel, lymphatic tissue- Peyer's Patches, nerve bundles-nerve plexes
sumucosa
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what type of tissue is the submucosa layer made of
connective tissue
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this layer has 2 layers of muscles and 3 layers in the stomach
- muscularis layer and they are longitudinal and circular and in the stomach has longitudinal, circular, and oblique muscles
- mixing waves
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this layer is made of serous membrane, produces serous fluid and forms connecting membranes
serosa
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what are the connecting membrane of serosa
- mesentary
- meso colon
- peritoneum
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the peritoneum has a outer layer called? and an inner layer called?
- parietal (outer layer)
- visceral (inner layer)
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the space inside the mucosa is called the
lumen
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stomach starts at the
lower esophageal sphincter aka cardiac sphincter
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what is the extra storage area on the upper right side of the body of the stomach called
fundus
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to the left side of the body of the stomach is called "gate keeper" and is the main cause of gastroesophageal reflux disease (GERD) that is called the
pylorus
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and next to the pyloris is the
pyloric sphincter
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stomach has ridges inside called
rugae
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what structure allows the stomach to expand like an accordian
rugae
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what is an aka name for gastric pits
gastric glands
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this area has tubes and sites of enzymes and stomach acid production
gastric pits aka gastric glands
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the gastric pits have mucous cells which produces
mucus
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the gastric pits also produces chief cells which produce what and what is an aka for chief cells
- chief cells aka zymogenic cells
- chief cells produce pepsinogen (inactive)
- pepsin (active)
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what is the inactive form of enzyme produced by the stomach in the gastric pits by the chife cells aka zymogenic cells to digest proteins
pepsiongen
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what is the active form of enzyme produced by the stomach in the gastric pits by the chife cells aka zymogenic cells to digest proteins
pepsin
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what is the most powerful enzyme produced by stomach to break down proteins
pepsin
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in the stomach in the gastric pits what produce Hydrochloric (Hcl) Acid
parietal cell
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what is HcL (Hydrochloric Acid) and what does it do?
stomach acid and it breaks down food molecules down
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what is the pH of stomach acid
1-3
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what is the intrinsic factor of the stomach in the parietal cells
helps body absorb vit. B-12
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is an endocrine in the stomach produces gastrin (hormone) and Chyme
G cell
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is a hormone that stimulates digestion produced by the G cell in the stomach
gastrin
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this is a mixture of food and digestive enzymes and HcL acid
chyme
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what is the name of the muscles between the eyes
corrugator
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small intestine has 3 division and is about 20 ft long. what are the 3 divisions
- duodenum (1 ft. or 12 inch)
- jejunum (8 ft)
- ileum (11 ft)
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what is the largest part of the digestive tract and is hwere most of the digestion and absorbtion is done
small intestine
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which part of the small intestine receives chyme from stomach
duodenum
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breaks down starches
amalyse
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carbs get broken down to
glucose and fats
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glucose and fats get broken down to
glycerol
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glycerol is a
fatty acid and is what get absorbed from fats
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proteins are broken down to
polypeptides
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polypeptides are broken down to
peptides
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peptides are broken down to
amino acids and is what is absorbed by the body
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what ezymes comes from the pancreas
pepsin and trypsine
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enzyme peptidase converts to
peptides to amino acids
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which enzyme digest proteins
pepsin
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what are the building blocks of amino acids
trypsin - proteins-polypeptides-peptidases-peptides-amino acids
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what enzyme breaks down starches (carbs)
amylase
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what is a complex carbohydrates (starch, fiber)
polysaccharides
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dissaccharides are _____ and is most common disaccharide is ____
sucrose (table sugar)
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sucrose is
glucose + fructose
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malt sugar is
glucose + glucose
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Lactose is
milk sugar, a mixture of glucose + glucose
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this is milk sugar and is a mixture of glucose + galactose
lactose
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sucrose, glucose, maltose, lactose are all a form of
monosacharides
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lipids are 2 components of fats. what are the 2 components of fats for lipids
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this enzyme breaks down fats into fatty acids and glyceral
Lipase
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a milk protein most people are allergic to
casein
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breaks down lactose
lactase
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breaks down maltose
maltase
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breaks down sucrose
sucrase
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receives chyme from stomach, bile from gallbladder, and digestive juice from pancreas
duodennum
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gut brain
entericnervous system (evs)
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upper GI
gastroenterology
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Inside of small intestines have these cicular folds called
plica circulares
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what is the function of plica circulares
- increase surface area
- decrease or slow down passage of food
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on the surface of villi and in each villus it has what to absorb fats
lacteals
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what forms triglyceride
fats-fatty acids andglycerol form trigyceride
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triglyceride gets packaged in with cholestrol and proteins called
chylomicron
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chylomicron is a combination of
triglyceride, cholestrol, and proteins
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what are the fat soluable vitamins
A D E K
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lymph capillaries absorb
fats
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blood capillaries absorb
glucose, fructose, galactose, amino acids
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water soluable vitamins are
B, C, Choline
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waht is another name for chylomicron
lipoproteins
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a combination of triglyceride, cholestrol, and proteins is
chylomicron aka lipoproteins
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Low proteins and high cholestrol is
LDL Low density lipoproteins
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more proteins and less cholestrol you have
HDL High densit lipoproteins
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vldl is
very low density lipoproteins
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triglycerides or aka triacyglycerols gets absorbed in
the lacteals
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bile is produced by
liver
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this is a mixture of bile salts, bile pigments, cholestrol.
bile
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bile is stored in
gallbladder
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what emulsifies fats
bile
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what makes poop brown or green and is the by prdoucto f red blood cells
- emulsification
- bilisubin-bilepigment
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bile is produced by the liver and goes through what duct
hepatic duct to cystic duct to gall bladder
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what contracts and squeeze bile out is the
gall bladder
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what trigger squeezin in the bile duct is the
fats
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in the stomach what hormone increase Hcl acid and increase gastric emptying
gastrin (hormone)
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in the duodenum what hormone increase secretion of bile and increase bicarbonate ion
secretin
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what causes contraction of gall bladder and increase pancreatic enzymes
CCK cholecystokinin
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what increases pH more basic, alkaline
bicarbonate ion
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what is the largest internal organ responsible for metabolism of carbs, fats, amino acids and production of blood proteins
liver
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what organ detoxify, recycles RBCs, stores fat solualbe vitamin (ADEK) sotres glycogen (glucose product) (grape and raison anology) and production of bile
liver
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what is 99% acini cells and 1% of islets of Langerfhens
pancreas
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where is the pancreas
below and behind stomach
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what part of the pancreas is what leads into the duodenum
pancreatic duct
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pepsin and typsin both break down
proteins
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what separates the small intestine from the large intestines
ileocecal valve (sphincter)
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WHAT IS THE 1ST part of the large intestine called
secum
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colon is also known as
large intestine
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what are the parts of the large intestine
- secum
- ascending
- transverse colon
- descending colon
- sigmoid colon
- rectum
- anus
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large intestine digest
bacteria
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what vitamin does bacteria produce
vitamin k
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the large intestine also absorbs
- water
- vitamin k
- minerals
- ions
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large intestine forms
feces
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cecum =
ileocecal valve (sphincter)
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large intestine starts at the
cecum aka ileocecal valve (sphincter)
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pouch of large intestine is called
haustra
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the process of mashing feces is called
haustra churning
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strip of tissue is a combo of smooth muscle and connective tissue is called
taeniae coli
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the fat pouches on taeniae coli on the large intestine are called
epiploic appendages
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name the structure of the large intestine from start to end
- cecum
- ascending colon R or hepatic flexure
- transverse colon L or splenic flexure
- descending colon
- sigmoid colon S shaped
- Rectum muscular canal
- anal canal
- anus
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turns on large intestine are called
flexures
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the anus has 2 sphincters
internal and external
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which sphincter on the anus is involuntary smooth muscle
internal sphincter
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which sphincter on the anus is voluntary skeletal muscle
external sphincter
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which vitamin is important for blood clotting and is produced by bacteria
vitamin k
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deciduous teeth
baby teeth
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what appendage is attached to the cecum
appendix
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stomach produce
- Hcl -hydrochloric acid
- intrensic factor
- vit. B12
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what enzyme is produced in saliva and pancreas
amylase
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saliva produces what enzymes
amylase and lipase
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