Key Area 2.6 (b) The Need For Transport In Animals: circulation

Question 1

What does the circulatory system consist of?

Answer 1

Heart, blood vessels and the blood

Question 2

What are the three types of blood vessel?

Answer 2

Arteries, capillaries and veins

Question 3

Describe arteries

Answer 3

Arteries carry blood away from the heart
Thick muscular wall
Blood at heigh pressure
Pulse can be detected

Question 4

Describe capillaries

Answer 4

Thin walls - one cell thick
Large surface area
For exchange of materials

Question 5

Describe veins

Answer 5

Carey's blood TOWARDS the heart
Thin muscular walls
No pulse detected
Blood at low pressure
Contains valves

Question 6

What do capillaries within an organ do

Answer 6

Creates a large surface area to allow efficient exchange of materials between the cells.

Question 7

Name the chambers of the heart (and their location)

Answer 7

Left and right Atria (top chambers)

Left and right Ventricles ( bottom chambers)

Question 8

What is the function of valves

Answer 8

To ensure that blood flows in only one direction

Question 9

Give two functions of the circulatory system

Answer 9

Pump oxygenated blood from the lungs, around the body

Remove carbon dioxide from body cells