- caudal sheath
- a tubular cytoplasmic structure at the base of the nucleus in the early spermatid.
Medical dictionary. 2011.
caudal sheath
Look at other dictionaries:
sheath — 1. Any enveloping structure, such as the membranous covering of a muscle, nerve, or blood vessel. Any sheathlike structure. SYN: vagina (1). 2. The prepuce of male animals, especially of the horse. 3. A specially designed tu … Medical dictionary
perciform — ▪ fish order Introduction any member of the order Perciformes, a group of bony fishes with more than 6,000 species placed in about 150 families. The order is the largest group of fishes in the world today. Perciform fishes occur in… … Universalium
part — A portion. SYN: pars [TA]. abdominal p. of aorta SYN: abdominal aorta. abdominal p. of esophagus [TA] the portion of the esophagus from where it passes through the diaphragm to the stomach. See … Medical dictionary
skeleton — skeletonless, adj. skeletonlike, adj. /skel i tn/, n. 1. Anat., Zool. the bones of a human or an animal considered as a whole, together forming the framework of the body. 2. any of various structures forming a rigid framework in an invertebrate.… … Universalium
human embryology — ▪ biology Introduction the process encompassing the period from the formation of an embryo, through the development of a fetus, to birth. The human body, like that of most animals, develops from a single cell produced by the union of… … Universalium
nervous system — Anat., Zool. 1. the system of nerves and nerve centers in an animal or human, including the brain, spinal cord, nerves, and ganglia. 2. a particular part of this system. Cf. autonomic nervous system, central nervous system, peripheral nervous… … Universalium
insect — insectival /in sek tuy veuhl/, adj. /in sekt/, n. 1. any animal of the class Insecta, comprising small, air breathing arthropods having the body divided into three parts (head, thorax, and abdomen), and having three pairs of legs and usually two… … Universalium
fish — fishless, adj. /fish/, n., pl. (esp. collectively) fish, (esp. referring to two or more kinds or species) fishes, v. n. 1. any of various cold blooded, aquatic vertebrates, having gills, commonly fins, and typically an elongated body covered with … Universalium
Fish — /fish/, n. Hamilton, 1808 93, U.S. statesman: secretary of state 1869 77. * * * I Any of more than 24,000 species of cold blooded vertebrates found worldwide in fresh and salt water. Living species range from the primitive lampreys and hagfishes… … Universalium
Muscular system of the horse — See also: Equine anatomy Contents 1 Types of muscle 2 Build of skeletal muscle 3 Tendons of the lower leg 4 Main skeletal muscles of the horse … Wikipedia
