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I did the diagram myself based on the one found on the book "Gray's anatomy" 36th edition, Williams & Warwick, 1980; and a diagram found of the review "Formation and organization of the mammalian sperm head" from Kiyotaka Toshimori and Chizuro Ito. (Chiba, Japan). Author: Mariana Ruiz Villarreal: Permission (Reusing this file)
Sperm quantity and quality are the main parameters in semen quality, which is a measure of the ability of semen to accomplish fertilization. Thus, in humans, it is a measure of fertility in a man . The genetic quality of sperm, as well as its volume and motility, all typically decrease with age . [ 17 ]
Levels of estrogen that are too high can be detrimental to spermatogenesis due to suppression of gonadotropin secretion and by extension intratesticular testosterone production. [35] The connection between spermatogenesis and prolactin levels appears to be moderate, with optimal prolactin levels reflecting efficient sperm production. [28] [36]
A human sperm cell consists of a flat, disc shaped head approximately 5.1 by 3.1 μm (0.20 by 0.12 mils), and a tail, known as a flagellum 50 μm (2.0 mils) long. [4] The flagellum propels the sperm cell at about 1 to 3 millimetres per minute (0.66 to 1.97 mils per second) [5].
Diagrams that show the development of male and female organs from a common precursor. Sperm ducts and fallopian tubes are not homologous, as the sperm ducts originate from the Wolffian ducts, whereas the fallopian tubes originate from the Müllerian ducts. Homologous structures in the external genitalia
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Complete diagram of a human spermatozoon Schematic of subcellular structures in a murine spermatid being formed showing the formation of the residual body and acrosomal cap. The process of spermiogenesis is traditionally divided into four stages: the Golgi phase, the cap phase, formation of the tail, and the maturation stage. [1]
Human_sperm_under_microscope.webm (WebM audio/video file, VP9, length 1 min 8 s, 640 × 480 pixels, 2.63 Mbps overall, file size: 21.26 MB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.