The heart is
a muscular organ that pumps blood throughout the body
How many chambers are there?
What are the chambers called
Atria and Ventricles
The atria is
the receiving chamber
the ventricle is
the discharging chamber
what are the three layers of the heart?
pericardium, myocardium and endocardium
describe the three layers of the heart
pericardium - fluid sac that encloses the <3 ; Myocardium - pumps blood ; Endocardium - smooth inner layer
what are the two main valves; what are they there for
tricuspid / bicuspid - prevent backflow of the blood
what side of the <3 receives deoxygenated blood?
right - pulmonary circuit
what side of the <3 receives oxygen rich blood?
left side - systemic circuit
what are the three blood vessels?
arteries , veins and capillaries
arteries take the blood from
<3 to body
veins take blood from
body to <3
transfer blood b/w veins and arteries
pathway of the blood..
superior/inferior vena cava - right atrium - tricuspid valve - right ventricle - pulmonary artery - lungs - pulmonary vein - left atrium - bicuspid valve - left ventricle - aorta - body
What is blood?
A complex, living tissue that contains many cell types and proteins
What are the two functions of blood?
- 1) pick up and deliver nutrients
- 2)take away waste
What are the four delivery jobs?
- 1) delivers nutrients from fats, proteins and carbohydrates to all body cells
- 2) delivers oxygen to all body cells
- 3) delivers chemical messengers to some body cells
- 4) delivers water, minerals and vitamins to all body cells
What are the three pick up jobs?
- 1) pick up carbon dioxide waste from all cells and carry to lungs
- 2) pick up chemical waste from cells and carry to the kidneys
- 3) pick up body heat and carry to the skin (red flush from excercise)
what are examples of animals with NO blood
sponges, jellyfish and flatworms
What are the two important components of blood?
- 1) Plasma - nonliving yellow liquid (92%water, 8% proteins,nutrients and salt)
- 2) Bone Marrow - the soft center of the bone (makes red and white blood cells)
Red blood cells ...
- - carry oxygen
- - 5 million in one drop of blood
- - live 120 days
- - no nucleus
- - make up the majority of your blood
a protein in red blood cells that joins with oxygen and gives the red cells their color ; contains IRON
a condition in which there are too few red blood cells in the blood (person feels week, tried and short of breath)
White blood cells ...
- - destroy harmful microbes
- - remove dead cells
- - make proteins that help prevent disease
- - have nucleus
- - bigger than red blood cells
- - 8000 in one drop of blood
- - live ten days
- - made in the spleen, thymus and tonsils
a blood cancer in which the number of white blood cells increases at an abnormal rate
- - aid in forming blood clots
- - not complete cells
- - smaller than red blood cells
- - 250,000 in a drop of blood
- - live 5 days
a Genetic disease in which a persons blood wont clot
What are the four main types of blood types
A , AB , B, O
What is the difference in the type of blood?
Difference is due to proteins found in red blood cells and in blood plasma
Type A and B blood cells are ..
different ; type A has antigens A and anti - B antibodies. type B has antigens B and anti - A antibodies
Type AB red blood cells ..
are the same as both A and B , has no plasma proteins ; has antigens A and B and neither antibodies
Type O ...
has plasma protein like A & B ; has neither A or B antigens but has both antibodies