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testes

   Also found in: Dictionary/thesaurus, Medical, Legal, Wikipedia, Hutchinson 0.04 sec.

testes

 or testicles

Male reproductive organs (see reproductive system). Humans have two oval-shaped testes 1.5–2 in. (4–5 cm) long that produce sperm and androgens (mainly testosterone), contained in a sac (scrotum) behind the penis. Each testis is divided into 200–400 lobes containing three to 10 very thin coiled tubes (seminiferous tubules) each, which produce the sperm and contract to expel them through a complex network of canals to another structure in the scrotum, the epididymis, for temporary storage. The cells in the testes are undeveloped in early childhood; at puberty they are stimulated by hormones to develop into fertile sperm cells.



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A group of dung beetle species that sprout horns like tiny elk, rhinos, or sci-fi invaders often face trade-otis between horn and testes sizes, say researchers.
Horns vs. sperm: male beetles on tight equipment budget by Milius, S. / Science News
Among other sites from which neoplasms metastatic to the sinonasal area originate are the kidneys, lungs, breasts, testes, uterus, thyroid, adrenal glands, skin, and pancreas.
Sinonasal intestinal-type adenocarcinoma by Rojas, Rafael / Ear, Nose and Throat Journal
In summary, although we accept that there may be differences between the two types of pasture that may have contributed in some way to the present studies--for which we have been unable to control--we believe that our study achieved its primary goal: We established that exposure of pregnant ewes to a complex cocktail of environmental chemicals (those present in treated sewage sludge) could selectively affect development of the testes of male fetuses.
Sheep reared on sewage sludge-treated pasture: sharpe responds by Sharpe, Richard / Environmental Health Perspectives
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