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Spermatogenesis

Spermatogenesis

Author: Aaron Mullally
Description:

This lesson will identify the steps and hormones involved in sperm formation.

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Tutorial

Video Images: Sperm image, Public Domain: http://en.wikipedia.org/w/index.php?title=File:Complete_diagram_of_a_human_spermatozoa_en.svg&page=1; Testes image 1, Public Domain: http://en.wikipedia.org/wiki/File:Illu_testis_surface.jpg; Testes image 2, Public Domain: http://en.wikipedia.org/wiki/File:Illu_testis_cross_section.jpg; Spermatogenesis image, Creative Commons: http://en.wikipedia.org/wiki/File:Seminiferous_tubule_and_sperm.jpg

TERMS TO KNOW
  • Seminiferous Tubules

    Tubules within chambers of the testes in which sperm are produced.

  • Spermatogenesis

    The process of sperm formation.

  • Sperm

    Male gametes produced in the testes.

  • Leydig Cells

    Cells of the testes that release testosterone.

  • Testosterone

    The male sex hormone that controls the development of the male reproductive system.

  • Secondary Sexual Traits

    Traits controlled by testosterone such as deepening of voice and facial hair development during puberty.

  • Follicle Stimulating Hormone (FSH)

    A gonadotropin secreted by the anterior pituitary gland, follicle stimulating hormone stimulates the production of gametes; sperm in males and ova in females. FSH’s secretion is regulated through negative feedback mechanisms and the hormone gonadotropin releasing hormone (GnRH).

  • Luteinizing Hormone (LH)

    A gonadotropin secreted by the anterior pituitary gland, LH stimulates Leydig cells to secrete testosterone while in females it promotes ovulation.

  • Gonadotropin-releasing Hormone (GnRH)

    A hormone secreted by the hypothalamus that stimulates the the anterior pituitary gland to secrete FSH and LH.