Prentice hall science explorer human biology and health chapter 3

24 terms by whitneythomas7

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These flashcards are on chapter 3 vocab. in prentice hall science explorer human biology and health. They are about Circulation. Creds to Ms.Hancock, the best science teacher ever!!!! I hope they can be of use to you!! :) :D :P -WhitneyThomas586

Aorta

carries blood from the left ventricle to the body.

Valve

a flap of tissue that prevents blood from flowing backward.

Capillary

materials are exchanged between blood and the body's cells in this blood vessel

Platelet

cell fragments that play an important part in forming blood clots

Heart Attack

occurs when blood flow to part of the heart muscle is blocked

pulse

caused by alternating expansion and relaxation of the artery wall

ventricle

lower chambers of the heart

Pacemaker

sends out signals that make the heart muscle contract

Blood Pressure

is caused by the force with which the ventricles contract

Lymph Node

the filter lymph, trapping bacteria and other disease-fighting microrganisms in the fluid

Red Blood Cell

take up oxygen in the lungs and deliver it to cells elsewhere in the body

Cardiovascular System

Consists of the heart, blood vessels, and blood

Hypertension

a disorder in which a person's blood pressure is consistently higher than normal: also called high blood pressure

Lymphatic System

a network of veinlike vessels that return fluid that leaks out of blood vessels to blood stream

plasma

the liquid part of the blood

diffusion

the process by which molecules move from an area of higher concentration to an area of lower concentration

Artery

a blood vessel that carries blood away from the heart

Lymph

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

Vein

a blood vessel that carries blood back to the heart

Hemoglobin

an iron-containing protein that binds chemically to oxygen molecules; makes up most of red blood cells

White Blood Cell

A blood cell that fights disease

Coronary Artery

an artery that supplies blood to the heart itself

Artherosclerosis

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

heart

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

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