The process in which an individual is made incapable of fertilization or reproduction.
Staircase Phenomenon
The steplike increase in muscle tension seen in successive contractions of a muscle; also known as the Treppe phenomenon.
Stable Cells
Cells that have a low rate of division, the the capacity to regenerate if injured.
Squamous Epithelium
Epithelium that consists of flat, thin and somewhat irregularly shaped cells.
Spongy Bone
Bone that is less dense, with bone spicules surrounded by spaces filled with red marrow; trabecular bone.
Splenic Flexure
Part of the colon located at the junction of the transverse and descending colons.
Spleen
A large, vascular lymphatic organ located in the left hypochondrium.
Spinal Nerve
Nerve attached to the spinal cord.