Key Terms

Question 0

Heart

Answer 0

A hollow, muscular organ that pumps blood throughout the body.

Question 1

Cardiovascular

Answer 1

The body system that consists of the heart, blood vessels, and blood, and that carries needed substances to cells and carries waste products away from cells.

Question 2

Atrium

Answer 2

Each of the two upper chambers of the heart that receives blood entering the heart.

Question 3

Ventricle

Answer 3

A lower chamber of the heart that pumps blood out to the lungs and body.

Question 4

Valve

Answer 4

A flap of tissue in the heart or a vein that prevents blood from flowing backwards.

Question 5

Pacemaker

Answer 5

A group of cells located in the right atrium that sends out signals that make the heart muscle contract and that regulates heart rate.

Question 6

Artery

Answer 6

A blood vessel that carries blood away from the heart.

Question 7

Capillary

Answer 7

A tiny blood vessel where substances are exchanged between the blood and the body cells.

Question 8

Vein

Answer 8

A blood vessel that carries blood back to the heart.

Question 9

Aorta

Answer 9

The largest artery in the body.

Question 10

coronary artery

Answer 10

An artery that supplies blood to the heart.

Question 11

Diffusion

Answer 11

The process by which molecules move from an area in which they are more concentrated to an area in which they are less concentrated.

Question 12

Blood pressure

Answer 12

The pressure that is exerted by the blood against the walls of blood vessels.

Question 13

Plasma

Answer 13

THe liquid part of the blood

Question 14

Red blood cell

Answer 14

A cell in the blood that takes up oxygen in the lungs and delivers it to cells elsewhere in the body.

Question 15

Hemoglobin

Answer 15

An iron-containing protein that binds chemically to oxygen molecules and makes up most of a red blood cell.

Question 16

White blood cell

Answer 16

A cell that’s fights diseases

Question 17

Platlet

Answer 17

A cell fragment that plays an important part in forming blood clots.

Question 18

Fibrin

Answer 18

A cell fragment that plays an important part in forming blood clots.

Question 19

Blood transfusion

Answer 19

The transference of blood from one person to another.

Question 20

Lymphamatic system

Answer 20

A network of veinlike vessels that returns body fluid to the bloodstream.

Question 21

Lymph

Answer 21

The fluid that the lymphatic system collects and returns to the bloodstream.

Question 22

Lymph node

Answer 22

A small knob of tissue in the lymphatic system that filters lymph.

Question 23

atherosclerosis

Answer 23

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

Question 24

Heart attack

Answer 24

A condition in which blood flow to parts of the heart are blocked, which causes heart cells to die

Question 25

Hypertension

Answer 25

A disorder in which a persons blood pressure is consistently higher then normal