6.2 The blood system

Question 1

William Harvey’s theories on:
- blood flow

Answer 1

William Harvey is credited with the discovery of the circulation of the blood. He combined earlier discoveries with his own discoveries to produce an overall theory for blood flow in the body. He showed that blood flow was too fast for the body to be able to consume the blood. He proposed the idea that the blood must be recycled. Harvey showed that the arteries carry blood away from the heart and it returns through the veins. Harvey had predicted the use of capillaries as light microscopes had not been invented yet.

Question 2

Galen’s thoughts on the body

Answer 2

Galen believed that the blood was formed in the liver and is pumped to and fro between the liver and the right ventricle of the heart. A little blood is

Question 3

State the function of arteries

Answer 3

Arteries convey blood at high

Question 4

Outline the role of elastic and muscle tissue in arteries.

Question 5

State the reason for toughness of artery walls.

Question 6

Describe the structure and function of the three layers of artery wall tissue

Question 7

Describe the mechanism used to maintain blood flow in arteries between heartbeats.

Question 8

Define systolic and diastolic blood pressure.

Question 9

Define vasoconstriction and vasodilation.

Question 10

Describe the structure and function of capillaries.