Animal Transport Flashcards
1
Q
Largest blood vessel in heart
A
Aorta
2
Q
Observable features that differentiate arteries and veins
A
Arteries have thicker walls than veins
Veins have larger lumen and valves
3
Q
Observable differences between left and right ventricles
A
Left ventricles have thicker muscle wall than right
4
Q
Structures that can be observed between atria and ventricles
A
Valves
5
Q
Why do veins have less muscle
A
Instead they contain semilunar valves that prevent back flow of blood
6
Q
Why do arteries have thick layer of smooth muscle
A
So can contract and relax
Alters blood flow to different organs
7
Q
Why do arteries have smaller lumen
A
To prevent friction
8
Q
Why do veins have larger lumen
A
Blood is under lower pressure this gives less resistance to blood flow
