Circulation

Question 1

What are the names of the 4 chambers in the heart?

Answer 1

Right atrium
Left atrium
Right ventricle
Left ventricle

Question 2

What does a artery do?

Answer 2

Carries blood away from the heart. Has thick walls because the blood pressure is high.

Question 3

What do capillaries do?

Answer 3

This is where substances are exchanged between the cells and the blood. Thin blood vessels.

Question 4

What do veins do?

Answer 4

These carry blood back to the heart. They often have valves to prevent the back flow of blood.

Question 5

Plasma

Answer 5

The liquid part of the blood. Transports substances such as Corbin dioxide and soluble food molecules(e.g amino acids).

Question 6

Red blood cells

Answer 6

Contains haemoglobin which binds to oxygen to transport it from the lungs to the cells.

Question 7

White blood cells

Answer 7

These defend against pathogens.

Question 8

Platelets

Answer 8

Fragments of cells which clot at the sight of a wounds.