Testosterone in the male and progesterone in the female are responsible for the development and maintenance of secondary sexual characteristics.
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Q130: In the male, the primary reproductive organs
Q131: The scrotal location of the testes provides
Q132: Development and maintenance of the male body
Q133: The sperm's genetic information is located in
Q134: Several hundred million sperm may reach maturity
Q136: The ductus deferens passes through the inguinal
Q137: The acrosome is an enzyme-filled vesicle at
Q138: The human testis contains many Leydig cells
Q139: The Sertoli cells provide nourishment for the
Q140: The developing sperm cells arising from a
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