Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Any of the four haploid cells that are formed by meiosis from a spermatocyte and that develop into spermatozoa without further division.
from The Century Dictionary.
- noun One of the two cells which arise by division of a secondary spermatocyte and give rise by transformation to a spermatozoön. In oögenesis the spermatid is represented by the oötid.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biology A
haploid cell , produced bymeiosis of aspermatocyte , that develops into aspermatozoon
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun an immature gamete produced by a spermatocyte; develops into a spermatozoon
Etymologies
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Examples
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The nuclear portion of the spermatid, which is partly imbedded in the supporting cell, is differentiated to form the head of the spermatozoön, while part of the cell protoplasm forms the middle piece and the tail is produced by an outgrowth from the double centriole of the cell.
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Seven of the mice were born after sperm heads were transferred into 23 eggs using a technique called round spermatid injection, and another five were born after 35 eggs were fertilised using intracytoplasmic sperm injection Icsi, a common IVF procedure.
The Guardian World News Ian Sample 2011
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We discussed spermatogenesis -- how we got from a diploid spermatogonial stem cell to a haploid spermatid -- and then spermiogenesis -- the process by which the spermatids acquire the features of spermatozoa: tails, acrosomes and the like.
ScienceBlogs Channel : Life Science Scicurious none@example.com 2010
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Spermiogenesis • Or spermateleosis • The process by which a spermatid becomes a spermatozoon.
Recently Uploaded Slideshows saktivinayaga 2010
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Giorgini F, Davies HG, Braun RE (2002) Translational repression by MSY4 inhibits spermatid differentiation in mice.
PLoS ONE Alerts: New Articles Hitomi Suzuki et al. 2010
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Vigodner M, Morris PL (2005) Testicular expression of small ubiquitin-related modifier-1 (SUMO-1) supports multiple roles in spermatogenesis: silencing of sex chromosomes in spermatocytes, spermatid microtubule nucleation, and nuclear reshaping.
PLoS ONE Alerts: New Articles Mara Marongiu et al. 2010
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Each spermatid (22 + X or 22 + Y) gradually change its shape to become spermatozoon.
Recently Uploaded Slideshows saktivinayaga 2010
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• Spermiogenesis is the process of transformation of a rounded spermatid into a spermatozoon.
Recently Uploaded Slideshows saktivinayaga 2010
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• The spermatid is amore or less circular cell containing a nucleus, Golgi apparatus, centeriole and mitochondria. all these components take part in forming the spermatozoon: 1.
Recently Uploaded Slideshows saktivinayaga 2010
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And please take note the Alien looks exactly like the humans that walk on earth, because of the spermatid in the world, that was used to create other ancient worlds.
www.hardwarezone.com.sg kamikazeben 2010
bilby commented on the word spermatid
"Each primary spermatocyte divides into two secondary spermatocytes, and each secondary spermatocyte into two spermatids or young spermatozoa; from this it will be seen that a primary spermatocyte gives rise to four spermatozoa."
- Henry Gray, 'Anatomy of the Human Body'.
September 20, 2009