MUCOUS MEMBRANE.—The lining of certain cavities of the body, such as the mouth, stomach, intestine, uterus, etc.
MUCUS.—The material manufactured by the glands in a mucous membrane.
MUSCLE-FIBERS.—The muscle-cells.
NARCOTICS.—Drugs which produce sleep.
NITROGEN.—One of the chemical elements.
NUCLEUS.—A clearly defined area found in every cell which seems to be its seat of government.
OBSTETRICS.—The branch of medicine which deals with the treatment and care of women during pregnancy and child-birth.
OVARY.—The organ which contains the egg-cells or ova.
OVIDUCTS.—Two tubes, each of which leads from the neighborhood of one of the ovaries; both terminate in the uterus.
OVUM.—An egg: the cell contributed by the mother to her offspring.