The Heart

Question 1

Label the heart.

Answer 1

1.
2.
3.
4.
5.

Question 2

Where is the heart located?

Answer 2

It is located on the left side of the chest beneath the breastbone.

Question 3

What type of muscle is the heart comprised of?

Answer 3

Cardiac muscle.

Question 4

How many chambers does the heart have? Name them.

Answer 4

The heart has four chambers namely: The right atrium, the left atrium, the left ventricle and the right ventricle.

Question 5

What type of cells or special cell causes the heart to contract?

Answer 5

The Pacemaker cells or the Sinoatrial node.

Question 6

Where does the blood in the right ventricle go?

Answer 6

Through the pulmonary artery and to the lungs.

Question 7

Where does the blood in the left ventricle go?

Answer 7

To the aorta and to the rest of the body.

Question 8

Is there a difference in pressure in the two sides of the heart?
If so, why?

Answer 8

Yes, the right side of the heart has a lower pressure than the left because the high pressure can damage the lungs. The left side has higher pressure than than the right in order to pump blood the body quickly and efficiently.

Question 9

What supply’s the heart with blood, oxygen and glucose?

Answer 9

The coronary artery.

Question 10

What is the function of the vena cavae?

Answer 10

They return deoxygenated blood from the body to the the right atrium of the heart to be re oxygenated.

Question 11

The function of the Pulmonary Artery is?

Answer 11

To carry deoxygenated blood to the lungs.

Question 12

The function the Right Atrium?

Answer 12

To receive deoxygenated blood from the vena cavae and pump it to the right ventricle.

Question 13

The function of the left atrium?

Answer 13

To receive oxygenated blood from the pulmonary vein and pump it to the left ventricle.

Question 14

The function of the Pulmonary Vein is?

Answer 14

To return oxygenated blood to the heart from the lungs.

Question 15

What is the function of the Right Ventricle?

Answer 15

To pump blood to the pulmonary artery.

Question 16

What is the function of the left ventricle?

Answer 16

To pump blood to the aorta.

Question 17

The function of the aorta is?

Answer 17

To carry oxygenated blood from the heart.

Question 18

The function of the Bicuspid Valve is ?

Answer 18

To prevent blood from flowing back into the left atrium.

Question 19

What is the function of the Tricuspid Valve?

Answer 19

To prevent the back flow of blood into the right atrium.

Question 20

The function of the Aortic valve is?

Answer 20

To prevent the back flow of blood into the left ventricle.

Question 21

The function of the Pulmonary valve is?

Answer 21

To prevent the back flow of blood into the the right ventricle.

Question 22

What is blood pressure?

Answer 22

The force exerted on the blood vessels by the blood passing through them.

Question 23

What is Hypertension?

Answer 23

When your blood pressure reaches a level of 140mmHg (systolic) and 90mmHg (Diastolic).

Question 24

Describe the Cardiac cycle in five steps.

Answer 24

1. The heart is in joint diastole.
2. The Sinoatrial node sends an electric impulse to the right atrium.
3. The signal travels to both atria which then contract and push blood into the ventricles. (atrial systole)
4. The ventricles contract decreasing their volume of blood and increasing pressure. (ventricular systole)
5. The blood is pushed through the semilunar valves and out of the heart through the aorta and pulmonary artery.