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External Anatomy
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Phylum
Cordata
Subphylum
Vertebrata
4 common features of embryonic Development
1. Presence of Notochord
2. Dorsal Hollow Nerve Cord
3. Pair of Pharyngeal Gill Slits
4. Postnatal Tail
Notochord
Bakcbone support of lower chordata
Nerve Chord
Hollow Nerve cord that develops into brain and spinal cord CNS
Types of Axial Support
1. Cranium
2. Vertebral Column
3. Ribs
4. Sternum
5. Appendicular Componenent
6. Skeletal Components of appendages
Appendicular Component is composed of...
Pelvic and Pectoral Gridles
Class
Mammalia
Human Order
Primates
Pigs Order
Artiodactyla
Commonalities in Mammals
1. Endothermal Regulation- Warm Blooded
2. Movable Eyelids
3. Non Nucleated erythrocytes
4. diaphragm- seperates thoracic and abdominal cavity
5. Milk- nurses young
6. Intrauterin Embryonic development
External Anatomy
3 Parts
1. Head and Neck
2. Trunk and Related Appendages
4. Tail
Head and Neck
4 parts
1. Nares
2. Snouth
3. Teeth
4. Pallilae on tongue- cntain taste buds and aid in food intake
Erythrocytes
Red blood Cells
Thorax
Anterior Region of Trunk
Abdomen
Posterior Region of trunk
Umbilical Cord
contains arteries and Veins that provide food to fetus
Allantoic Stalk
Carries waste away from fetus- part of umbilical cord
Mammary Papillae
protrusions that surround umbilical cord and are used to nurse the young
Genital Papillae
second opening under the anus which only the female contains
Males have
Scrotal sac= 2 large folds of skin
Preputial Orifice
Protrusion posterior to umbilical cord that contains penis
Two Divisions under Phylum
Invertebrate animals
:
urocordates- sea squirts
ccephalocordates- lancets
Vertebral Column
same thing as notocord in higher cordates. only remnants of the notocord are remaining
Pharynx
anteriormost portion of the digestive tract located just behind the mouth
Class
Vertebrates or Mammalia
Nicitating Membrane
a translucent covering that cleans the eyeball by sweeping across its surface
Thorax
anteriormost region of the trunk
abdomen
posteriormost region of the trunk (bulk of the trunk)
sternum
breastbone
Total Number of Ribs
12 -
7 connected via cartilage to the sternum
5 connect through common cartilage with sternum or float
Xiphoid Process
The posterior most bone of the sternum
Epithelia is advantageious because
It divides the Thoracic cavity and the lungs to minimize trauma
Pericardial Sac
the epithelium that covers the heart
Thymus
Posterior portion located above heart on outside
Is an endocrine gland that is active in maintining an immune system
Duodenum
the site where the fbile duct connects to the small intestine
Pancreas
plays a role in digestive and endocrine system
Jejunum
the area where the bulk of chemical digestion takes place.. connects to duodenum
Caecum
small pouch or Blind sac.. beginning of large intestine
Appendix in hmans
Parts of large intestine
Caecum- appendix = cellulose digestion and fermentation reservoir
Colon- largest part of large intestine, joins small intestine in the posterior of the abdomen
decending colon- posterior dorsal portion of colon that empties into the rectum
Rectum- storage of feces until expulsion thorugh anus
alimentary canal
storage solvent of digestive juijces and enzymes recovered in large intestine
Esophogous
lies adjacent to trachea on dorsal surface
Messentary
small blood vessels, nerves and lymphatic vessels that supply the small intestine
Author
mhmalik
ID
12936
Card Set
External Anatomy
Description
General information on fetal pig dissection
Updated
2010-04-04T02:36:27Z
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