click below
click below
Normal Size Small Size show me how
NA CH. 6 KEY TERMS
NA CH. 6 KEY TERMS | DEFINITIONS |
---|---|
artery | a blood vessel that carries blood away from the heart |
capillary | a tiny blood vessel; food, oxygen, and other substances pass from the capillaries to the cells |
cell | the basic unit of body structure |
digestion | the process of physicallly and chemically breaking down food so that it can be absorbed for use by the cells |
hemoglobin | the substance in red blood cells that carries oxygen and gives blood its color |
hormone | a chemical substance secreted by the glands into the bloodstream |
immunity | protection against a disease or condition; the person will not get or be affected by the disease |
menstruation | the process in which the lining of the uterus breaks up and is discharged from the body through the vagina |
metabolism | the burning of food for heat and energy by the cells |
organ | group of tissues with the same function |
peristalsis | involuntary muscle contractions in the digestive system that move food through the alimentary canal |
respiration | the process of supplying the cells with oxygen and removing carbon dioxide from them |
system | organs that work together to perform special functions |
tissue | a group of cells with similar function |
vein | a blood vessel that carries blood back to the heart |