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  • Jose Emmanuel Cisneros posted an update in the group Group logo of Microscopic Photos of Reproductive System Tissue SlidesMicroscopic Photos of Reproductive System Tissue Slides 4 years, 1 month ago

    TESTICLES/TESTES
    The testes, which have both an exocrine (sperm-producing) and an endocrine (testosterone-producing) function, are the male’s primary reproductive organs. These accessory reproductive structures are ducts or glands that help sperm reach the outside of the body or the female reproductive tract.
    The spermatic cord, a connective tissue sheath that encloses blood arteries, nerves, and the ductus deferens, connects the golf ball-sized testis to the trunk and is roughly 4 cm (1.5 inches) long and 2.5 cm (1 inch) wide.
    • PARTS OF THE TESTES:
      • The tunica albuginea [A] (“white coat”) is a fibrous connective tissue capsule that covers each testis. This capsule’s (septa) extensions pierce the testis and divide it into a slew of wedge-shaped lobules. One to four tightly coiled lobules make up each lobule [B]. The true “sperm-forming factories” are the seminiferous tubules [C] of each lobule, which dump sperm into another set of tubules, the rete testis [H], on one side of the testis.
      • • Sertoli cells [D] are the testis’s somatic cells, which are required for testicular development and spermatogenesis. Sertoli cells help germ cells become spermatozoa by facilitating direct interaction and managing the environment within the seminiferous tubules. FSH and testosterone regulate spermatogenesis through their actions on Sertoli cells.
        • • The interstitial cells, also known as Leydig cells [E&F], which are functionally separate cells that create testosterone, are found in the soft connective tissue surrounding the seminiferous tubules.
          • • The tubuli recti [G] are short tubules that connect the seminiferous tubules to the mediastinal rete (0.5–1 mm long). Cuboidal epithelium lines the tubuli recti. There are about 1500 tubuli recti in total (or their analogous seminiferous tubule segments). The tubuli recti in the cranial, central, and anterior testis drain into the mediastinal rete testis channel, while those in the caudal testicular area drain into parallel channels.
            • REFERENCES:
              Botswick, D. G., & Cheng, L. (2008). Uro;ogic Surgical Pathology (2nd Edition). USA: Elsevier.
              Brelje, T., & Sorenson, R. L. (2021). CHAPTR 19 – MALE REPRODUCTIVE SYSTEM (Testis). Retrieved from Histology System: https://histologyguide.com/slideview/MHS-267-testis-and-epididymis/19-slide-1.html
              Griswold, M. D. (1998). The central role of Sertoli cells in spermatogenesis. Semin Cell Dev Biol., 9(4):411-6. doi: 10.1006/scdb.1998.0203.
              Marieb, E. N., & Keller, S. M. (2018). The Reproductive System. In E. N. Marieb, & S. M. Keller, Essentials of Human Anatomy & Physiology (12th Edition) (p. 565). New York City: Pearson.

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