Plate 14.264 Testis
Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Paul M. Heidger,
Peer Review Status: Externally Peer Reviewed
Human, 10% formalin, H. & E., 162 x.
This is a section of the testis showing the seminiferous tubules separated by interstitial connective tissue. The seminiferous tubules are lined by a stratified epithelium, the germinal epithelium, composed primarily of sex cells with some supporting cells. The epithelium rests on a basement membrane that varies in thickness with age. The lumina of the seminiferous tubules contain mature sex cells (spermatozoa). Seminiferous tubules are separated by an interstitial stroma made up of loose connective tissue and containing the interstitial cells of Leydig. These large ovoid cells that occur in groups secrete testosterone, the male sex hormone.
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