sper·ma·tid / ˈspərməˌtid/ • n. Biol. an immature male sex cell formed from a spermatocyte that can develop into a spermatozoon without further division.DERIVATIVES: sper·ma·ti·dal / ˌspərməˈtīdl/ adj.
spermatid A nonmotile cell, produced during spermatogenesis, that subsequently differentiates into a mature spermatozoon. Four spermatids are formed after two meiotic divisions of a primary spermatocyte and therefore contain the haploid number of chromosomes.
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Spermatocyte , spermatocyte A diploid cell that undergoes meiosis and forms four spermatids. A primary spermatocyte undergoes the first meiotic division to form two… Ova , ova An ovum (plural ova) is a mature egg released at ovulation. In humans only one egg is normally shed, from one of the ovaries, about 14 days after… Gamete , Gamete A gamete is a specialized reproductive cell . The cells usually have one half as many chromosomes in their nuclei as the majority of body cell… Embryo Sac , embryo sac The female gametophyte (an oval structure in the nucellus of the ovule) of flowering plants, formed by the division of the haploid megaspo… Malpighian Layer , Malpighian layer (stratum germinativum) The innermost layer of the epidermis of mammalian skin, separated from the underlying dermis by a fibrous bas… oocyte , oocyte The cell that, following meiosis, forms the ovum. Most of the cytoplasmic growth involved in ovum formation is accomplished by the primary ooc…
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