The Structure Of The Heart

Question 1

What is the heart?

Answer 1

A muscular organ that pumps blood around the body.

Question 2

Where is the heart located?

Answer 2

In the thoracic cavity behind the sternum.

Question 3

What does the left pump deal with?

Answer 3

Oxygenated blood from the lungs.

Question 4

What does the right pump deal with?

Answer 4

Deoxygenated blood from the body.

Question 5

What are the two chambers of each pump?

Answer 5

Atrium

Ventricle

Question 6

What is the atrium?

Answer 6

Thin-walled and elastic and stretches when it collects blood.

Question 7

What is a ventricle?

Answer 7

This has a much thicker muscular wall that enables it to contract strongly to pump the blood some distance.

Question 8

Why are two pumps need?

Answer 8

This is so that the pressure is always high enough to pump blood around the body or to the lungs.

Question 9

Why does the right ventricle have thinner tissue?

Answer 9

It does not need to blood as far and low pressure is needed for the pulmonary capillaries.

Question 10

Do both sides of the heart pump I time with each other?

Answer 10

Yes

Question 11

Do both sides of the heart pump the same volume of blood?

Answer 11

Yes

Question 12

What is the left atrioventricular valve also known as?

Answer 12

Bicuspid valve.

Question 13

What is the right atrioventricular valve also known as?

Answer 13

Tricuspid valve.

Question 14

Where do the ventricles pump blood into?

Answer 14

The arteries.

Question 15

Where do the atria receive blood from?

Answer 15

The veins.

Question 16

What are the vessels that connect the heart to the lungs known as?

Answer 16

Pulmonary vessels.

Question 17

What is the aorta connected to?

Answer 17

The left ventricle.

Question 18

What does the aorta carry?

Answer 18

Oxygenated blood.

Question 19

Where does the aorta carry the oxygenated blood to?

Answer 19

To all parts of the body except the lugs.

Question 20

Where is the vena cava connected to?

Answer 20

The right atrium.

Question 21

What does the vena cava carry?

Answer 21

Deoxygenated blood.

Question 22

Where does the vena cava carry the blood back from?

Answer 22

It carries it back from he tissues of the body except the lungs.

Question 23

What is the pulmonary artery connected to?

Answer 23

The right ventricle.

Question 24

What does the pulmonary artery carry?

Answer 24

Deoxygenated blood.

Question 25

Where does the pulmonary artery carry the blood to?

Answer 25

It carries it to the lungs.

Question 26

What is the pulmonary vein connected to?

Answer 26

The left atrium.

Question 27

What type of blood does the pulmonary vein carry?

Answer 27

Oxygenated blood.

Question 28

Where does the pulmonary vein carry blood from?

Answer 28

The lungs.

Question 29

Does the heart have its own blood supply?

Answer 29

Yes

Question 30

What supplies oxygenated blood to the heart?

Answer 30

The coronary arteries.

Question 31

Where do the coronary arteries branch off from?

Answer 31

The aorta shortly after it leaves the heart.

Question 32

What causes myocardial infarction or a heart attack?

Answer 32

Blockage of the coronary arteries.

Question 33

What happens in a myocardial infarction?

Answer 33

The heart is deprived of oxygen so the muscle cells in this region can’t respire. Therefore, they die.