How the heart works

Question 1

How much does the adult heart weigh?

Answer 1

200 to 425 grams, about the size of your fist.

Question 2

Is a large vein that brings deoxygenated blood back to the heart and empties it to the right atriuma. What is this?

Answer 2

Vena Cava

Question 3

There are two atria, the _ and the _, which are the two upper chambers of the four muscular chambers of the heart.

Answer 3

the right atrium and the left atrium

Question 4

The _ collects the impure blood from the vena cava and delivers it to the right ventricle. this delivery is regulated by the tricuspid valve.

Answer 4

right atrium

Question 5

The _ collects the oxygenated blood from the lungs, via the pulmonary veins and delivers it to the left ventricle. this delivery is regulated by the mitral valve.

Answer 5

left atrium

Question 6

There are two ventricles, _ and _, which are the two lower chambers of the four muscular chambers of the heart.

Answer 6

left and right

Question 7

The _ collects the impure blood from the right atrium and delivers it to the lungs for purification. This delivery is regulated by the pulmonary valve.

Answer 7

right ventricle

Question 8

The _ collects the pure blood (oxygenated blood) from the left atrium and delivers it to the aorta (main artery) from where it is pumped to the rest of the body. This delivery is regulated by the aortic valve.

Answer 8

left ventricle

Question 9

Blood after oxygenation in the lungs is brought back to the heart by _ and delivered to the left atrium

Answer 9

pulmonary veins

Question 10

The largest artery in the body. collects blood pumped from the left ventricle to the branch and delivers oxygen-rich blood to various organs and tissues in the human body, what is this?

Answer 10

aorta

Question 11

The _ is the fluid-filled sac that surrounds the heart. The heart literally floats in this pericardial fluid, what is this?

Answer 11

pericardium

Question 12

The _ consists of the blood vessels that supply blood to and remove blood from the heart tissue. Coronary arteries supply oxygen-rich blood to the heart and the coronary veins remove the deoxygenated blood from the heart.

Answer 12

coronary circulation

Question 13

Blood is supplied to the heart by the _. Two main arteries branch off the aorta then branch into several smaller arteries that supply oxygen-rich blood to the heart.

Answer 13

coronary arteries

Question 14

The deoxygenated blood from the heart muscle is collected by the _ and drained into the right atrium.

Answer 14

coronary veins

Question 15

The heart acts as a pump, delivering blood to the organs, tissues, and cells of your body through a complex network of _, _, and _. Blood is returned to your heart through venules (small veins) and veins.

Answer 15

arteries, arterioles, capillaries

Question 16

The heart is a pump and each contraction of the heart represents _.

Answer 16

one heartbeat

Question 17

_ or _ is the number of heartbeats per minute.

Answer 17

pulse or heart rate

Question 18

The heart rate is controlled by the brain and varies depending on, factors such as _, _, _, _, and _.

Answer 18

age, stress, exercise, the surrounding temperature, and hormones.

Question 19

In a normal resting adult, how many heartbeats does the heartbeat per minute?

Answer 19

72 times per minute.

Question 20

The main function of the _ is to regulate and prevent the backflow of the blood.

Answer 20

heart valves

Question 21

The _ regulates blood flow between the right atrium and right ventricle.

Answer 21

tricuspid valve

Question 22

The _ regulates blood flow between the left atrium and the left ventricle.

Answer 22

mitral valve

Question 23

The _ regulates the deoxygenated blood from the right ventricle to the lungs for purification.

Answer 23

pulmonary valve