性器官-男性性器官
The
Sex Organs
- The Male Sex Organs |
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男性外部性器官：陰囊 |
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陰囊是一個容納睾丸的皮膚囊袋，它從陰莖的基部懸垂於兩大腿之間。陰囊的皮膚色澤相對要深和含有許多腺體。其內部，有兩個分隔的空間，每一個空間容納一個睾丸及其精索。精索向上進入腹膜腔，它其中的一部分是一根較細的管道，為精子通過的輸精管。輸精管切除術恰恰切斷的就是這根管道。精索也含有血管、神經和平滑肌。為了適應某些刺激，尤其是適應低溫刺激，精索的平滑肌收縮，以提拉睾丸靠近腹部。與此同時，陰囊的皮膚也會收縮，使得皮囊變厚和出現皺褶。但是，通常情形下，陰囊鬆弛地懸垂著，其皮膚看起來薄薄的、滑滑的。從某種程度上看，陰囊像一個自動調溫器一樣發揮著作用，它試圖在睾丸內為精子的持續產生調節出一個恰好的溫度。這一溫度必須略低於身體其餘部位。 |
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The
External Sex Organs: The Scrotum |
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The scrotum is a bag or pouch of skin which contains the testicles, and which hangs between the thighs at the base of the penis. The skin of the scrotum is comparatively dark and contains many sweat glands. Inside the scrotum there are two separate compartments, each of which contains one testicle and its spermatic cord which leads upward into the abdominal cavity. Part of this spermatic cord is a thin tube through which the sperm travels - the vas deferens. It is this vas deferens that is cut in a vasectomy. The spermatic cord also contains blood vessels, nerves, and muscles. In response to certain stimuli, especially cold temperatures, these muscles contract and pull the testicle closer to the abdomen. At the same time, the skin of the scrotum will also contract and appear thick and wrinkled. Ordinarily, however, the scrotum hangs loose, and its skin looks thin and smooth. In a way the scrotum acts like a thermostat, trying to provide an even temperature for the continuous production of sperm which is taking place inside the testicles. This temperature has to be slightly lower than that of the rest of the body. |
