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testes

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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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To find out what might cause sperm cells to revert, Matunis's research team genetically altered the flies so that both cells became sperm, reducing the stem cell population in the testes to nothing.
Byline: ANI Washington, Mar 24 (ANI): Researchers at Georgetown University Medical Center have shown that adult human testes cells can be turned into embryonic stem-like cells.
A group of seven men reported feeling numb on Monday soon after eating the testes of "fugu" blowfish, which is highly prized in Japan but is supposed to be prepared only by specially trained chefs because of its potential risk.
 
 
 
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