The Heart

Question 1

What does the right side of the heart do?

Answer 1

Pumps deoxygenated blood to the lungs

Question 2

What does the left side of the heart do?

Answer 2

Pumps oxygenated to the lungs

Question 3

How is the left ventricle different to the right ventricle physically?

Answer 3

Thicker and more muscular

Question 4

Why is the left ventricle thicker and more muscular?

Answer 4

Has to pump blood to the rest of the body, needs more force

Question 5

How are ventricles different to the atria?

Answer 5

Thicker walls

Question 6

Why do ventricles have thicker walls than atria?

Answer 6

• They have to push blood out the heart

- Atria only have to push blood a short distance into ventricles

Question 7

What is the purpose of the atrioventricular valves?

Answer 7

Stops blood flowing back into atria when ventricles contract

Question 8

Where are the atrioventricular valves?

Answer 8

Between the atria and the ventricles

Question 9

What are the two types of atrioventricular valve?

Answer 9

• Tricuspid

- Bicuspid

Question 10

What side of the heart is the tricuspid valve?

Answer 10

Right side

Question 11

What side of the heart is the bicuspid valve?

Answer 11

Left side

Question 12

Where are the semi lunar valves?

Answer 12

Between ventricles and pulmonary artery + aorta

Question 13

What is the purpose of the semi lunar valves?

Answer 13

Stops blood flowing back into ventricles from aorta and pulmonary artery after ventricles contract

Question 14

What can be seen in an external examination of the heart?

Answer 14

• Four main vessels attached to the heart
• Left and right atria
• Left and right ventricles
• Coronary arteries

Question 15

What is the difference between the way blood vessels feel in an external examination?

Answer 15

• Arteries: thick and rubbery

- Veins: much thinner

Question 16

What are the steps in an internal examination of the heart?

Answer 16

• Ventricles cut open using scalpel

- Atria cut open using scalpel

Question 17

What can be seen in an internal examination of the heart?

Answer 17

• Wall of left ventricle - thicker than the right
• Atria walls thinner than ventricle walls
• Structures of AV and semi lunar valves

Question 18

What does the aorta do?

Answer 18

Carries oxygenated blood from left ventricle to body

Question 19

What does the pulmonary artery do?

Answer 19

Carries oxygenated blood from lungs to left atrium

Question 20

What does the vena cava do?

Answer 20

Carries deoxygenated blood from body to right atrium

Question 21

What does the pulmonary vein do?

Answer 21

Carries oxygenated blood from lungs to left atrium

Question 22

What does the left atrium do?

Answer 22

Pumps oxygenated blood from pulmonary vein to left ventricle

Question 23

What does the right atrium do?

Answer 23

Pumps deoxygenated blood from vena cava to right ventricle

Question 24

What does the left ventricle do?

Answer 24

Pumps oxygenated blood to the body through aorta

Question 25

What does the right ventricle do?

Answer 25

Pumps deoxygenated blood to the lungs through pulmonary artery