性器官-男性性器官
The Sex Organs - The Male Sex Organs |
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內部性器官：睾丸 |
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點擊看大圖
Click on picture.
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精子的產生
睾丸被分隔出數百個小小的間隔，其內含有不比頭髮絲粗多少的、緊密蟠曲的細小管道。在這些管道（稱為生精小管）裏，是精子產生（稱為精子發生）的場所。當男性長到青春期，精子產生就開始了，自此會終其一生。精子產生有三個步驟：
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The Internal Sex Organs: The Testicles The Production of Sperm
A testicle is composed of hundreds of small compartments which contain tightly coiled tubes not much thicker than a hair. Inside these tubes (called seminiferous tubules) the process of sperm production (called spermatogenesis) takes place. This process begins when the male reaches puberty and continues without interruption throughout his life. The production of sperm proceeds in three steps.
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