The Circulatory System - Blood Vessels

Question 1

What are the 3 types of blood vessel?

Answer 1

Arteries, Capillaries and Veins

Question 2

Where do arteries take blood?

Answer 2

Away from the heart (to organs)

Question 3

What are capillaries involved in?

Answer 3

The exchange of materials at the tissues

Question 4

Where do veins carry blood?

Answer 4

To the heart

Question 5

The heart pumps the blood out at [ ] pressure

Answer 5

High

Question 6

The artery walls are [ ] and [ ]

Answer 6

Strong and elastic

Question 7

Artery walls are [ ] compared to the size of the hole down the middle (the [ ])

Answer 7

thick

lumen

Question 8

Artery walls contain thick layers of [ ] to make them strong, and [ ] to allow them to stretch and spring back

Answer 8

Muscle

Elastic fibres

Question 9

Arteries branch into [ ]

Answer 9

Capillaries

Question 10

What size are capillaries?

Answer 10

Tiny

Question 11

What do capillaries do?

Answer 11

Carry blood really close to every cell in the body to exchange substances with them

Question 12

Capillaries have [ ] walls, so substances can [ ] in and out

Answer 12

Permeable

Diffuse

Question 13

What do capillaries supply to cells? What do they take away?

Answer 13

Food and oxygen

Take away: Waste products (CO2)

Question 14

How many cells thick are the walls of capillaries? Why?

Answer 14

One cell thick. Increase the rate of diffusion by decreasing the distance over which it occurs

Question 15

Capillaries eventually join up to form…

Answer 15

Veins

Question 16

The blood is at [ ] pressure in veins, therefore the walls are thicker/thinner than artery walls

Answer 16

low

Thinner

Question 17

Do veins have smaller lumen than arteries? Why?

Answer 17

No, they have bigger lumen to help with blood flow despite the lower pressure`

Question 18

What do veins have to help with blood flow (apart from bigger lumen)?

Answer 18

Valves, to help keep blood flowing in the right direction