Blood Vessles

Question 1

Name the 3 blood vessels

Answer 1

Arteries
Arterioles
Veins

Question 2

What do arteries do

Answer 2

Carry blood away from the heart at high pressure

Question 3

3 structures of arteries

Answer 3

Thick and muscular walls
Narrow lumen
Elastic tissue

Question 4

3 structure of arteries relating to its function

Answer 4

• thick and muscular walls to transport blood away from the heart under high pressure
• narrow lumen to maintain high pressure
• elastic tissue that stretches and recoils to maintain high blood pressure and smooth blood flow

Question 5

What do arterioles do

Answer 5

Control blood flow to capillaries and regulates blood pressure

Question 6

3 structures of arterioles

Answer 6

Thick layer of muscle
Less elastic tissue
Small lumen

Question 7

3 stcrures of arterioles relating to its funtion

Answer 7

• thick layer of muscle for vasodilation and vasoconstriction
• less elastic tissue bcs of low blood pressure
• small lumen aiding pressure regulation

Question 8

What do veins do

Answer 8

Returns blood to the heart at low pressure

Question 9

2 structures of veins

Answer 9

Thin walls
Valves

Question 10

2 structures of veins relating to its function

Answer 10

Thin walls bcs the blood is at low pressure and not involved in constriction
Valves to prevent backflow

Question 11

3 structural properties of capillaries

Answer 11

One cell thick walls
Narrow lumen
Large surface area due to large number of them and branching

Question 12

3 stcrural properties of cappilaries relating to its function

Answer 12

• one cell thick for a short diffusion distance for efficient gas/ nutrient exchange
• narrow lumen which forces rbc to squeeze thru single file to increase time for exchanger and increase surface area
• large surface area due to large number of them and branching which maximises exchange b/w blood and tissues