Veins and capillaries

Question 1

function of veins/venous system

Answer 1

to carry de-oxygenated blood away from a territory and towards the heart

Question 2

properties of veins

Answer 2

low pressure
non-pulsatile
have valves
have thin walls, collapse when empty

Question 3

describe the 3 mechanisms of venous return of blood back to the heart

Answer 3

venous valves ensure blood flows the right way
skeletal muscle pump, when muscles in the lower limb contact this pumps the blood
accompanying veins, veins located close to an artery that use it pulse to pump

Question 4

name the 2 different sets of veins

Answer 4

superficial and deep

Question 5

name the 2 main venous systems

Answer 5

systemic and hepatic

Question 6

describe the role of the systemic venous system

Answer 6

to drain blood away from all other organs and tissue to the vena cavae

Question 7

describe the role of the hepatic venous system

Answer 7

to drain blood from absorptive part of GI tract to the liver to clean it

Question 8

describe the structure of a capillary

Answer 8

they are lined by a single layer of endothelium and have a very narrow lumen, allowing one RBC through at a a time

Question 9

function of capillaries

Answer 9

allows for exchange of gases, metabolites and waste