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The organ of sperm production. In addition, the testis (testicle) is an organ of endocrine secretion in which male hormones (androgens) are...
Testes (in 'Reproductive system' article)
The typical testis is a compact organ which varies greatly in shape in different groups of vertebrates. In all but a few primitive forms each testis i
Testes (in 'Reproductive system' article)
The testes have two important structural elements, the contorted seminiferous tubules and the interstitial cells which are situated between the tubule


= Encyclopedia Article; = Research Update
Figure 1.Human seminiferous tubules in cross section. A multitude of stages of germ cells is present.
From Encyclopedia article 'Testis'
Figure 2.Major pathways for the biosynthesis of testosterone in the testis and subsequent metabolism of the hormone.
From Encyclopedia article 'Testis'
Figure 3.Relation of testicular temperature to scrotal and deep-body (rectal) temperature, and temperature gradients along the testicular and spermatic vessels in the ram. (After G. M. H. Waites and G. R. Moule, J.Reprod.Fert., 2:213, 1961)
From Encyclopedia article 'Testis'
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