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| | Gray, Henry. 1918. Anatomy of the Human Body. Page 1237 |
 | | descend to the inguinal canal, along which they pass with the spermatic cord, and, emerging at the subcutaneous inguinal ring, they descend into the scrotum, becoming invested in their course by coverings derived from the serous, muscular, and fibrous layers of the abdominal parietes, as well as by the scrotum. |
 | | It is divided on its surface into two lateral portions by a ridge or raphé;, which is continued forward to the under surface of the penis, and backward, along the middle line of the perineum to the anus. |
 | | Its external aspect varies under different circumstances: thus, under the influence of warmth, and in old and debilitated persons, it becomes elongated and flaccid; but, under the influence of cold, and in the young and robust, it is short, corrugated, and closely applied to the testes. |
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