Atlas de Anatomia do Corpo Humano - Central

The atlas of human body

Germ Cells
Germ Cells

The reproductive cells in multicellular organisms.

Spermatozoa
Spermatozoa

Mature male germ cells derived from SPERMATIDS. As spermatids move toward the lumen of the SEMINIFEROUS TUBULES, they undergo extensive structural changes including the loss of cytoplasm, condensation of CHROMATIN into the SPERM HEAD, formation of the ACROSOME cap, the SPERM MIDPIECE and the SPERM TAIL that provides motility.

Spermatids
Spermatids

Male germ cells derived from the haploid secondary SPERMATOCYTES. Without further division, spermatids undergo structural changes and give rise to SPERMATOZOA.

Spermatocytes
Spermatocytes

Male germ cells derived from SPERMATOGONIA. The euploid primary spermatocytes undergo MEIOSIS and give rise to the haploid secondary spermatocytes which in turn give rise to SPERMATIDS. Sperm Maturation;

Spermatogonia
Spermatogonia

Euploid male germ cells of an early stage of SPERMATOGENESIS, derived from prespermatogonia. With the onset of puberty, spermatogonia at the basement membrane of the seminiferous tubule proliferate by mitotic then meiotic divisions and give rise to the haploid SPERMATOCYTES.

Sperm Head
Sperm Head

The anterior portion of the spermatozoon (SPERMATOZOA) that contains mainly the nucleus with highly compact CHROMATIN material.

Acrosome
Acrosome

The cap-like structure covering the anterior portion of SPERM HEAD. Acrosome, derived from LYSOSOMES, is a membrane-bound organelle that contains the required hydrolytic and proteolytic enzymes necessary for sperm penetration of the egg in FERTILIZATION. Acrosome Reaction;

Ovum
Ovum

A mature haploid female germ cell extruded from the OVARY at OVULATION.

Zygote
Zygote

The fertilized OVUM resulting from the fusion of a male and a female gamete.

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