- anulus of spermatozoon
- a dark ringlike structure at the posterior end of the middle piece of a spermatozoon. Called also ring centriole.
Medical dictionary. 2011.
anulus of spermatozoon
Look at other dictionaries:
middle piece — n the portion of a sperm cell that lies between the nucleus and the flagellum * * * an anterior portion of the tail of the spermatozoon, bounded by the neck anteriorly and the anulus posteriorly. Called also connecting p. See illustration at… … Medical dictionary
principal piece — the main portion of the tail of a spermatozoon, beginning at the anulus and gradually tapering toward the end piece. Called also chief p. See illustration at spermatozoon … Medical dictionary
body — 1. The head, neck, trunk, and extremities. The human b., consisting of head (caput), neck (collum), trunk (truncus), and limbs (membra). 2. The material part of a human, as distinguished from the … Medical dictionary
ring centriole — a common misnomer for the anulus of the spermatozoon, which is not actually a centriole … Medical dictionary