Papers & Essays

Media Literacy

  • Home / Spermatogenesis essay | Просмотров: 49116 | #49700
  • Spermatogenesis essay

    spermatogenesis essay

    The inside of the seminiferous tubules are lined with Sertoli cells and spermatogonia.Spermatogenesis is the production process of sperm.A germ cell is any biological cell that gives rise to the gametes of an organism that reproduces sexually.While parts of meiosis are similar to mitotic processes, the two systems of cellular division produce distinctly different outcomes.Spermatogenesis is the process by which male primordial germ cells called spermatogonia undergo meiosis, and produce a number of cells termed spermatozoa.A mature human Spermatozoon Contents * 1 Purpose * 2 Location * 3 Stages * 3.1 Spermatocytogenesis * 3.2 Spermatidogenesis * 3.3 Spermiogenesis * 4 Role of Sertoli cells * 5 Influencing factors * 6 Hormonal control * 7 See also * 8 References * 9 External links Spermatogenesis produces mature male gametes, commonly called sperm but specifically known as spermatozoa, which are able to fertilize the counterpart female gamete, the oocyte, during conception to produce a single-celled individual known as a zygote.Preparations of total synaptonemal complexes (SC) from spermatocyte I nuclei in meiotic prophase I. A sperm cell has a head containing the haploid nucleus, a midpiece containing mitochondria, and a tail that is a flagellum. At the tip of the head is the acrosome, a bag of digestive enzymes that helps to erode tissues surrounding the female egg cell. , that function to support and nourish the immature sperm cells by giving them nutrients and blood products.Formation of haploid ovum from the diploid germ cells in the ovary.There, they undergo meiosis, followed by cellular differentiation into mature gametes, either eggs or sperm.
    • Spermatogenesis is the process of making sperm cells or developing immature germ cells into mature sperm cells. The stages of.
    • How and what hormone is involved in spermatogenesis is the focus. Please follow the instructions below in the image.
    • Custom Essays biography How does oogenesis compare Show more How does spermatogenesis compare in grasshopper, frog and
    • Genesis is the creation of something. Soooo, if we smash "sperm" and a few more letters into the word "genesis," then we get spermatogenesis, which is the.

    spermatogenesis essay

    This is the cornerstone of sexual reproduction and involves the two gametes both contributing half the normal set of chromosomes (haploid) to result in a chromosomally normal (diploid) zygote.Both spermatogenesis and oogenesis are accomplished in three phases: multiplication phase, growth phase and maturation phase.Sperm are immobile at body temperature; therefore, the scrotum and penis are external to the body so that a proper temperature is maintained for motility.They pass through the tight junctions of the blood-testis barrier and further differentiate into primary spermatocytes until they complete their development. The Reproductive System The reproductive system occurs in both male and female.In mammals it occurs in the male testes and epididymis in a stepwise fashion, and for humans takes approximately 64 days.[2] Spermatogenesis is highly dependent upon optimal conditions for the process to occur correctly, and is essential for sexual reproduction.Unlike animals, plants do not have germ cells designated in early development.Each sper­matogonia is diploid and contains 46 chromosomes.(c) Maturation phase or formation of spermatids: Some of the spermatogonia called primary spermatocytes periodically undergo meiosis.(In some organisms, meiosis creates haploid gametophytes that by means of mitosis generate gametes. The testes are ovoid structures suspended by a spermatic cord in the scrotum.

    spermatogenesis essay

    These stem cells are called spermatogonia which form from the yolk sac or the extraembryonic membrane and migrate into the testis during the fifth week of embryonic development (Tortora and Derrickson, 2006, p. Spermatogonia are inactive during childhood as spermatogenesis begins at the onset of puberty – around 10 years of age when hormones effect the maturation of the reproductive system.Meiosis is the type of cell division that allows sexual reproduction, since it reduces the number of chromosomes of the species to a half, making the combination of two gametes to form a new individual possible.A male’s ability to reproduce depends on a high quality and quantity of sperm; therefore, spermatogenesis occurs continually from the time of puberty until death.However when division takes place, it is unequal, which forms 1 secondary oocyte (haploid) and a first polar body (haploid) which degenerates and dies.During this period, some spermatogonia still remain dormant because they function as reserve cells for sperm formation in the future.A primary spermatocyte completes the first meiotic division (reduction division) leading to formation of two equal haploid cells called secondary spermatocytes, which have only 23 chromosomes each.Coiled in each testis are seminiferous tubules that produce sperm.

    spermatogenesis essay spermatogenesis essay

    What is Spermatogenesis? with pictures

    Spermatogenesis essay: Rating: 92 / 100 All: 243
    Updates in this section

    Write a comment

    *CRN reserves the right to post only those comments that abide by the terms of use of the website.

    Section Contents: