Circulatory System

Question 1

Heart

Answer 1

Muscle that pumps blood throughout the body.

Question 2

Atrium

Answer 2

2 upper chambers of the heart.

Question 3

Ventricles

Answer 3

2 lower chambers of the heart.

Question 4

Valve

Answer 4

Is a flap of tissue that prevents blood from flowing backward.

Question 5

Septum

Answer 5

Separates the left atrium and ventricle from the right atrium and right ventricle.

Question 6

Aorta

Answer 6

Largest artery in the body.

Question 7

Venna Cava

Answer 7

Largest vein in the body.

Question 8

Artery

Answer 8

Carry blood away from the heart.

Question 9

Vein

Answer 9

Brings blood back to the heart.

Question 10

Capillaries

Answer 10

Exchanges substances and gases.

Question 11

Pulse

Answer 11

Is caused by the alternating expansion and relaxation of the artery wall.

Question 12

Blood Pressure

Answer 12

Is caused by the force with which ventricles contract.

Question 13

Sphygmomanometer

Answer 13

Instrument used to measure blood pressure.

Question 14

Plasma

Answer 14

Liquid part of blood. Water makes up 90% of blood. Transports nutrients and oxygen.

Question 15

Red Blood Cells

Answer 15

Carry oxygen throughout the body.

Question 16

White Blood Cells

Answer 16

Are the body’s disease fighters. They fight infections.

Question 17

Hemoglobin

Answer 17

Iron containing protein that binds to oxygen and carbon dioxide.

Question 18

Platelets

Answer 18

They collect and stick to the vessel at the site of the wounds and stop the blood flow which creates a scab.

Question 19

Atherosclerosis

Answer 19

A condition in which an artery wall thickens as a result of the buildup of fatty materials.

Question 20

Heart Attack

Answer 20

Occurs when blood flow to part of the heart muscle is blocked.

Question 21

Hypertension

Answer 21

Is a disorder in which a person’s blood pressure is consistently higher than normal.