Blood Vessels

Question 1

The direction of flow is kept up by

Answer 1

Pumping of the heart

Question 2

In each organ what moves into the cells and what moves back into the blood

Answer 2

Sugar and oxygen moves into the cells and carbon dioxide back into the blood

Question 3

Where do arteries carry the blood

Answer 3

Away from the heart

Question 4

Arteries 3 points

Answer 4

Strong thick muscular walls to withstand high pressure as blood is pumped through all parts of the body.
Small lumen.
Thick layer of muscle and elastic fibres

Question 5

Where do veins carry the blood

Answer 5

Carry’s blood back to the heart

Question 6

Explain veins

Answer 6

Veins have relatively thin walls as they have low pressure .
Veins have valves to help keep the blood flowing in one direction back to the heart.
Large lumens

Question 7

What do capillaries do

Answer 7

Very tiny vessel with narrow lumens
Capillaries allow substances to exchange at body cells e.g food and oxygens
Capillaries have very thin walls to allow these substances to leak through.