Topic 4 - The Blood Vessels Flashcards
1
Q
What are the 3 main blood vessels?
A
- Arteries
- Veins
- Capillaries
2
Q
What do arteries do?
A
Carry blood away from the heart
3
Q
What are the features of arteries?
A
Thick walls containing muscle and elastic tissue
4
Q
What do veins do?
A
Carry blood towards the heart
5
Q
How are arteries different from veins?
A
Veins have thinner walls
6
Q
What do veins often have?
A
Valves along their length to prevent backflow of blood
7
Q
What are capillaries?
A
Narrow, thin-walled vessels
8
Q
What do capillaries do?
A
Carry the blood through the organs
9
Q
What do capillaries allow?
A
Exchanges of substances with all the living cells in the body
10
Q
What are the blood vessels arranged into in humans and animals?
A
Double circulatory system
11
Q
What happens in the double circulatory system?
A
- In one side, carries blood away from your heart to your lungs and back again
- The other carries blood from your heart to all other organs of your body and back again
