7.3 circulatory system of a mammal Flashcards
1
Q
what is the name of the circulatory system in mammals?
A
double circulatory system
2
Q
why is a circulatory system needed in mammals?
A
high rate of metabolism
3
Q
where is blood pressure lost in?
A
when blood enter lungs
4
Q
why blood must be pumped again?
A
to re-establish pressure
5
Q
how is diffusion made rapid with a human circulatory system?
A
materials are diffused through capillaries through a large SA
6
Q
describe the pathway of blood entering and leaving the heart, from the body and the lungs.
A
1 - vena cava
2 - right atrium
3 - right AV valve
4 - right ventricle
5 - semi-lunar valve
6 - pulmonary artery (to lungs)
7 - pulmonary veins
8 - left atrium
9 - left AV valve
10 - left ventricle
11 - semi-lunar valve
12 - aorta
