5.1 The Heart

Question 0

What is the heart surrounded by?

Answer 0

Lung tissue

Question 1

Where is the heart found?

Answer 1

The thorax

Question 2

What protects it?

Answer 2

Sternum and ribs

Question 3

How many chambers are in the heart?

Answer 3

Four

Question 4

The right side of the heart

Answer 4

Receives blood from the body and pumps it to the lungs

Question 5

Blood leaving the right side of the heart is

Answer 5

Deoxygenated

Question 6

The left side of the heart

Answer 6

Receives blood from the lungs and pumps it round body

Question 7

Blood leaving leaving the left side of the heart is

Answer 7

Oxygenated

Question 8

The heart is made up of what muscle?

Answer 8

Cardiac muscle

Question 9

Is the oxygen demand high or low?

Answer 9

High!

Question 10

There is a very good blood supply via the

Answer 10

Coronary arteries

Question 11

Each side has how many chambers?

Answer 11

Two

Question 12

The atrium is

Answer 12

Thin-walled and elastic. It stretches as it collects blood.

Question 13

The ventricle is

Answer 13

Much thicker muscular wall as it has to pump blood much further

Question 14

Which side has a thicker ventricular wall?

Answer 14

Left

Question 15

What do valves do?

Answer 15

Maintain the one-way flow of blood through the circulatory system.

Question 16

What is the name of the two atrioventricular valves?

Answer 16

Bicuspid and tricuspid

Question 17

What do the atrioventricular valves do?

Answer 17

Prevent blood being forced back into the atria.

Question 18

What helps the atrioventricular valves?

Answer 18

Tendons

Question 19

Where are the semilunar valves located?

Answer 19

The beginning of the aorta and pulmonary artery

Question 20

What do the semilunar valves do?

Answer 20

Stop blood being pulled back into the ventricles