spermatogonia
spermatogonia Mitotically active cells in the gonads of male animals, which give rise to primary spermatocytes.
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spermatid , sper·ma·tid / ˈspərməˌtid/ • n. Biol. an immature male sex cell formed from a spermatocyte that can develop into a spermatozoon without further divis… Protozoan , protozoan (prō´təzō´ən), informal term for the unicellular heterotrophs of the kingdom Protista. Protozoans comprise a large, diverse assortment of m… Ectoderm , Skip to main content
ectoderm
ectoderm, layer of cells that covers the surface of an animal embryo after the process of gastrulation has occurred. Th… Syncytium , syncytium (pl. syncytia) A group of animal cells in which cytoplasmic continuity is maintained. For example, the cells of striated muscle form a sync… 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… Cyclic Guanosine Monophosphate , cyclic GMP (cGMP) Cyclic guanosine monophosphate: a derivative of the nucleotide guanosine triphosphate (GTP) that, like cyclic AMP, acts as a second…
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spermatogonia