The short interval between the application of a stimulus to a muscle and the contraction of the muscle.

White blood cell;the four principal types of leukocytes are granulocytes, macrophages, monocytes, and lymphocytes.

Connective tissue that joins two bones.

Tendency for certain alleles to be inherited together due to proximity on the same chromosome.

Any enzyme that catalyzes the cleavage of a fatty acid anion from a triglyceride or phospholipid.

Any of a heterogeneous group of fats and fatlike substances, including fatty acids, neutral fats, waxes, and steroids, which are water-insoluble and soluble in nonpolar solvents. Lipids, which are easily stored in the body, serve as a source of fuel, are an important constituent of cell structure, and serve other biological functions. Compound lipids comprise the glycolipids, lipoproteins, and phospholipids.

In genetics, the specific site of a gene on a chromosome.

The U-shaped section of a mammalian nephron.

The cavity or channel within a tube or tubular organ.

A hormone produced by the anterior lobe of the pituitary gland that stimulates ovulation and the development of the corpus luteum in the female and the production of testosterone by the interstitial cells of the testis in the male. Also called interstitial cell-stimulating hormone, lutropin.

A transparent, usually slightly yellow, often opalescent liquid found within the lymphatic vessels, and collected from tissues in all parts of the body and returned to the blood via the lymphatic system. Its cellular component consists chiefly of lymphocytes.

A mononuclear, nongranular leukocyte having a deeply staining nucleus containing dense chromatin and a pale-blue?staining cytoplasm. Chiefly a product of lymphoid tissue, it participates in immunity.