part 2 Flashcards
1
Q
Why is the heart called a double pump?
A
Blood passed through the heart twice in each circuit.
2
Q
What are the 2 purposes of valves?
A
To make sure blood flows in the right direction.
To prevent backflow of blood (flows backwards).
3
Q
Name the 3 types of blood vessels.
A
Arteries, Capillaries and veins.
