B4 Transport

Question 1

What is a double circulatory system

Answer 1

Is one where blood passes through the heart twice to do one complete circuit of the body.

Question 2

What are the two loops of the double circulatory system

Answer 2

• first transport blood to the lungs

- the second transports blood around the tissues of the body

Question 3

Name features of the artery

Answer 3

It has :

• thick walls
• thick layer of muscle and fibres
• small lumen

Question 4

Name features of a vein?

Answer 4

• large lumen
• relatively thick walls
• often have valves

Question 5

Name the different parts of the heart

use picture

Answer 5

Right ventricle / Right artrium
Vena cara 
Aorta 
Pulmonary artery / pulmonary vein
Left artium / left ventricle

Question 6

Why is the left ventricle wall thicker than the right

Answer 6

Because it has more pressure so it needs to have thicker walls to pump more blood

Question 7

Starting from the right artium where does the blood circulate the body.

Answer 7

-> right ventricle -> PA -> Lungs -> PV -> Left artium -> Left ventricle -> aorta -> body -> back to Right artium

Question 8

What happens in cornonay heart disease

Answer 8

_ The arteries become narrow because of build up of fat

• It reduces blood flow to heart
• it causes pain , heart attack or death

Question 9

What is a mechanical heart valve

Answer 9

These valves are made of lightweight strong and durable materials such as titanium . They will last 20-30 years before a replacement is needed