Capillaries Flashcards
1
Q
What are capillaries?
A
Site of substance exchange with cells
2
Q
Why does the vena cava have the lowest pressure?
A
It’s the final blood vessel to return to the heart
3
Q
When is blood pressure highest in the aorta?
A
Immediately after ventricular contraction
4
Q
Why do multicellular organisms require a transport system?
A
Low SA:V & cannot rely on diffusion to supply or remove substances because diffusion distance is too long
5
Q
What does the smooth muscle layer do?
A
Contract to control flow of blood in arteries, arterioles & veins
6
Q
Label the heart
A
https://quizlet.com/219844718/label-the-heart-diagram/
7
Q
What is the pulmonaRy artery connected to & what does it do?
A
RIGHT VENTRICLE
Carries deoxygenated blood to lungs where oxygen is replenished & its CO2 removed
