Circulation

Question 1

The wall of the heart is made of

Answer 1

Muscle

Question 2

The hear consist of four chambers what are they

Answer 2

Right atrium
Left atrium
Right ventricle
Left ventricle

Question 3

What are the 3 different types of vessels

Answer 3

Arteries
Veins
Capillaries

Question 4

What are the arteries

Answer 4

These carry blood away from the heart

They have thick walls because the blood pressure is high

Question 5

What are the capillaries

Answer 5

Very thin blood vessels

This is where substances are exchanged between the calls and the blood

Question 6

What are veins

Answer 6

These carry blood back to the heart

They often have valves to prevent backflow of the blood

Question 7

What is plasma

Answer 7

The liquid part of the blood

Transports substances such as carbon dioxide and soluble food molecules eg glucose

Question 8

What is a red blood cell

Answer 8

Contains haemoglobin which binds to oxygen to transport it from the lungs to the tissues

Question 9

What are the white blood cells

Answer 9

These defend the body against pathogens

Question 10

What are platelets

Answer 10

Fragments of cells which clot blood at the site of wounds