tissue composed of cells that lines the internal and external surfaces of the body; plural is epithelia

a belch; oral ejection of gas or air from the stomach

Process by which teeth break through the gum to appear in the jaw

reddening of the skin

immature red blood cells

red blood corpuscles or cells

the formation of red blood cells

hormone produced by the kidney which stimulates the bone marrow to produce new red blood cells

a cell with cytoplasm containing a membrane-bound nucleus in addition to other organelles

the process by which waste materials are removed from the body