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Anatomy Atlases: Atlas of Microscopic Anatomy: Section 1 - Cells Atlas of Microscopic Anatomy: Section 14 - Male Reproductive System

Plate 14.268 Interstitial Cells

Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Paul M. Heidger, Jr., Ph.D.
Peer Review Status: Externally Peer Reviewed


INTERSTITIAL CELLS
Testis

Plate 14.268 Interstitial Cells

Human, 10% formalin, H. & E., 612 x.

 

This figure shows parts of two seminiferous tubules separated by a connective tissue sheath. Within this connective tissue sheath are embedded large ovoid cells, the interstitial cells of Leydig. These occur in groups, have a rounded, large eccentric nucleus with a prominent nucleolus and a vacuolated cytoplasm, which results from the loss of lipid droplets and crystals during tissue processing. The interstitial cells are the source of testosterone, the male sex hormone, whose functions include the development and maintenance of secondary sex characteristics and the structure and function of the male accessory organs, the development of psychosexual behavior (in part) in the mature male, a role in protein metabolism, and the regulation of the output of the pituitary gonadotropic hormone, interstitial cell-stimulating hormone (ICSH). The seminiferous tubules shown reveal part of their contents, spermatogonia, spermatids, and Sertoli cells (see Plates 21, 264, and 265).

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