Circulatory System Flashcards
1
Q
Why does the heart have valves?
A
Prevent the backward flow of blood.
2
Q
Why does the heart have cardiac muscle?
A
Cause the pumping action.
3
Q
What is the double pump?
A
-Blood that is pumped from heart returns to the heart.
-blood pumped to muscle then back to heart.
4
Q
3 advantages of double blood:
A
-more pressure.
-high blood pressure so greater flow to tissue
-separation of oxygenated and deoxygenated blood
