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Testosterone is secreted by which endocrine part of testis?
Cells of Leydig
Seminiferous tubules
Tunica albuginea
Sertoli cells

A

Cells of Leydig

B

Seminiferous tubules

C

Tunica albuginea

D

Sertoli cells

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Solution

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The regions outside the seminiferous tubules called interstitial space contain small blood vessels and interstitial cells or Leydig cells. These cells synthesize and secrete testicular hormones called androgens (testosterone) and little amount of estrogen. It helps to maintain secondary sexual characters in a male.
So, the correct answer is option A.

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