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testis |
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testis (tĕs`tĭs) or testicle (tĕs`tĭkəl), one of a pair of glands that produce the male reproductive cells, or sperm sperm or spermatozoon (spûr'mətəzō`ən, –zō`ŏn) ..... Click the link for more information. . In fetal life the testes develop in the abdomen, then descend into an external sac, the scrotum. A testis is composed of about 800 coiled seminiferous tubules whose linings contain cells that develop into sperm. These tubules merge into a larger tube called the epididymis that leads out of the testis into the vas deferens. Between the seminiferous tubules there is interstitial tissue that secretes the male sex hormone testosterone testosterone (tĕstŏs`tərōn), principal androgen, or male sex hormone . ..... Click the link for more information. , which stimulates the development of the male reproductive system and secondary sex characteristics. Sometimes the testes do not descend normally before or shortly after birth and remain in the abdomen or groin. Such a condition requires medical attention or the gland will eventually become sterile. See also reproductive system reproductive system, in animals, the anatomical organs concerned with production of offspring. In humans and other mammals the female reproductive system produces the female reproductive cells (the eggs, or ova) and contains an organ in which development of the fetus ..... Click the link for more information. . |
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| Especially in immature males, testis length diminished with increasing concentrations of many of these compounds, including DDT, polybrominated diphenyl ether (PBDE) flame retardants, and banned termiticides called chlordanes. He appears to have misunderstood the purpose of our study, which was to provide evidence as to whether or not the complex mixture of chemicals that are present in treated sewage sludge are able to exert any effects on the developing fetal testis in the sheep. True hermaphrodites) Defined by having one ovary, one testis, and either a clitoris, penis, or a combination of the two, which is called a cliteropenis or penoclitoris depending on which predominates |
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testis
