B4 Transport Flashcards Preview

Biology > B4 Transport > Flashcards

Flashcards in B4 Transport Deck (9)
Loading flashcards...
1
Q

What is a double circulatory system

A

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

2
Q

What are the two loops of the double circulatory system

A
  • first transport blood to the lungs

- the second transports blood around the tissues of the body

3
Q

Name features of the artery

A

It has :

  • thick walls
  • thick layer of muscle and fibres
  • small lumen
4
Q

Name features of a vein?

A
  • large lumen
  • relatively thick walls
  • often have valves
5
Q

Name the different parts of the heart

use picture

A
Right ventricle / Right artrium
Vena cara 
Aorta 
Pulmonary artery / pulmonary vein
Left artium / left ventricle
6
Q

Why is the left ventricle wall thicker than the right

A

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

7
Q

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

A

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

8
Q

What happens in cornonay heart disease

A

_ The arteries become narrow because of build up of fat

  • It reduces blood flow to heart
  • it causes pain , heart attack or death
9
Q

What is a mechanical heart valve

A

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