Unit 2 - Arteries, Capillaries And Veins

Question 1

What is the function of the cardiovascular system ?

Answer 1

To transport blood and other substances around the body

Question 2

What is the direction of blood flow

Answer 2

Heart - arteries - capillaries - veins - Back to the heart

Question 3

What is the central lumen of a blood vessel ?

Answer 3

The central cavity

Question 4

What is the function of arteries

Answer 4

To carry blood away from the heart

Question 5

What are the walls of arteries made from ?

Answer 5

A think layer of smooth muscle

And

An inner and outer layer of connective tissue containing elastic fibres

Question 6

What does elasticity allow artery walls to do

Answer 6

Pulsate which accommodates the surge of blood after each heartbeat

Question 7

Arterioles are what

Answer 7

Small arteries

Question 8

Arterioles can control blood flow by what two processes

Answer 8

Vasodilation and vasoconstriction

Question 9

What is vasodilation

Answer 9

The relaxation of smooth muscle to increase blood flow

Question 10

What is vasoconstriction

Answer 10

The contraction of smooth muscle to decrease blood flow