Category: A

Programmed cell death (apoptosis) occurring in epithelial cells. It is associated with loss of the normal ability to establish contacts between the cell and the extracellular matrix.  

The positive pole of an electrical source. The thin, pale, shiny squamous epithelium covering the lower half (below the pectinate line) of the anal canal. This epithelium is hairless and has no glands. Positive electrode; the anode is usually red and is marked with a P or a plus (+) sign. The positive electrode or…

The muscle and fibrous tissue lying between the coccyx and the anus.  

Relate to both the anus and coccyx.  

Closure of a hernial ring by suture.  

Surgical repair of a ring-shaped structure (e.g., a heart valve, an intervertebral disk).  

The phylum that includes earthworms, leeches, and other segmented worms. Some annelids are intermediate hosts for parasitic worms. Leeches are ectoparasites. The medicinal leech, Hirudo medicinalis, is the source of an anticoagulant that is used to treat myocardial infarction and other conditions caused by blood clots.  

A structural protein in red blood cells that binds cell membrane transport molecules to spectrin.  

Stricture or imperforation of the urethra.  

An instrument for cutting the frenulum of the tongue in tongue-tie.