Spermatogonium - Wikipedia
A spermatogonium (plural: spermatogonia) is an undifferentiated male germ cell. Spermatogonia undergo spermatogenesis to form mature spermatozoa in the seminiferous tubules of the testicles. There are three subtypes of spermatogonia in humans: Type A …
Spermatogonia: Location and function - Kenhub
2021年4月8日 · Spermatogonia are small, round stem and progenitor cells of the testes that give rise to spermatozoa through the process of spermatogenesis. They are diploid cells and possess 23 pairs of chromosomes. Spermatogonia are located specifically in the basal compartment of the epithelial wall of the seminiferous tubules of the testes.
生精细胞 - 百度百科
精原细胞 (spermatogonia)是成熟睾丸中最幼稚的生精细胞，位于曲细精管生精上皮的最外层。 直接与曲细精管基膜相接触。 根据精原细胞核的形态、大小，染色质的染色及致密度，核仁的位置及数量，胞质中有无糖原等形态结构特点，一般精原细胞分为三型：暗型精原细胞 (dark type A，Ad)、亮型精原细胞A (Pale type A, Ap)和B型精原细胞 (type B)。 精母细胞位于生精上皮中层，分 初级精母细胞 (Primary spermatocyte)和次级精母细胞 (secondary spermatocyte)两种。 …
精原细胞 - 维基百科，自由的百科全书
精原细胞 （Spermatogonia，单数形式 Spermatogonium） [1] 是一类 分化 程度较低的 生殖细胞，能分化为初级 精母细胞。 在成人体内精原细胞分布于生精上皮基膜上。 精子发生 过程中，精原细胞先分化为初级精母细胞，再分化为次级精母细胞、 精细胞，最后经過变形形成成熟的 精子 [2]。 精原细胞可以分为A型精原细胞、B型精原细胞。 A型精原细胞中具有 干细胞 类群，能根据细胞核染色的深浅分为明A型精原细胞与暗A型精原细胞。 暗A型精原细胞又称为 精原干细胞。 …
Spermatogonium - an overview | ScienceDirect Topics
Spermatogonia are rounded cells that lie in contact with the basement membrane of the seminiferous tubules. They are the stem cells of the system, dividing to maintain their own numbers and to produce the cells that embark on the process of development into spermatozoa.
Spermatogenesis - Developmental Biology - NCBI Bookshelf
Spermatogenesis is the production of sperm from the primordial germ cells. Once the vertebrate PGCs arrive at the genital ridge of a male embryo, they become incorporated into the sex cords.
Spermatogonium - an overview | ScienceDirect Topics
Spermatogonia represent the stem cell population of the germ cells. They lie on the basement membrane but are not attached to it. There are three classes of spermatogonia: stem cell spermatogonia, proliferative spermatogonia, and differentiating spermatogonia.
Spermatozoa Development - Embryology
5 天之前 · spermatogonia - The cells located in the seminiferous tubule adjacent to the basal membrane that either divide and separate to renew the stem cell population, or they divide and stay together as a pair (Apr spermatogonia) connected by an intercellular cytoplasmic bridge to differentiate and eventually form spermatazoa.
Regulation of spermatogonia - StemBook - NCBI Bookshelf
2008年7月14日 · Spermatogenesis is a complex process, in which spermatogonial stem cells form spermatozoa. This process is continuous throughout the adult life in most mammals. Sertoli cells play a crucial nurturing role in coordinating and supporting important events of spermatogenesis.
Spermatocytogenesis - Wikipedia
Spermatocytogenesis is the male form of gametocytogenesis and involves stem cells dividing to replace themselves and to produce a population of cells destined to become mature sperm. The stem cells involved are called spermatogonia and are a …
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