What does a secondary spermatocyte do?
Each secondary spermatocyte completes the second meiotic division without the replication of DNA and produces 2 spermatids each containing 23 chromosomes. Spermatids undergo morphologic alteration (spermiogenesis) to become mature spermatozoa.
What is spermatogenesis in histology?
As mentioned above, spermatogenesis is the process by which sperm cell production occurs; the germ cells give rise to the haploid spermatozoa. Sperm production takes place inside the seminiferous tubules, which is a convoluted cluster of tubes located inside the testes.
Which cells are formed from secondary spermatocytes?
Each primary spermatocyte divides into two secondary spermatocytes and each secondary spermatocyte into two spermatids or young spermatozoa. These develop into mature spermatozoa, also known as sperm cells.
What do spermatogenic cells do?
The spermatogenic cells divide by mitosis, then meiosis to form gametes, which mature into sperm by the process of spermiogenesis. Unusually, the developing spermatogenic cells remain connected by cytoplasmic bridges, until they have formed a mature spermatozoan.
What is the result of spermiogenesis?
The spermatids are transformed into spermatozoa (sperm) by the process of spermiogenesis. These develop into mature spermatozoa, also known as sperm cells. Spermatozoa are the mature male gametes in many sexually reproducing organisms.
What is secondary Spermatocyte?
Secondary spermatocytes are haploid (N) cells that contain half the number of chromosomes. In all animals, males produce spermatocytes, even hermaphrodites such as C. elegans, which exist as a male or hermaphrodite.
What is secondary spermatocyte?
What is process of spermatogenesis?
Spermatogenesis is the process of sperm cell development. Rounded immature sperm cells undergo successive mitotic and meiotic divisions (spermatocytogenesis) and a metamorphic change (spermiogenesis) to produce spermatozoa. Mitosis and meiosis.
Why is spermiogenesis important?
Biological importance Spermiogenesis is an essential biological process as it leads to the transformation of spermatids into mature spermatozoa. Sertoli cells, the specialized epithelial cells in the seminiferous tubules, help by nourishing them and grooming them into mature spermatozoa.
How does a spermatocyte form two haploid spermatids?
Then, without any chromosomal replication, each secondary spermatocyte undergoes an equational division to form two 1N (haploid) spermatids. The result is that each spermatid has only one allele of each gene and that allele could be from either the maternal or the paternal chromosome.
When do gonocytes turn into spermatogonial stem cells?
In humans at about 2 months of age, primordial germ cells (gonocytes) are replaced by adult dark (Ad) and pale (Ap) spermatogonia forming the spermatogonial stem cell (SSC) population that at puberty will commence differentiation into spermatozoa.
How are spermatogonial stem cells sensitive to radiation?
Although spermatocytes that divide mitotically and meiotically are sensitive to radiation and cancer, spermatogonial stem cells are not. Therefore, after termination of radiation therapy or chemotherapy, the spermatognia stems cells may re-initiate the formation of spermatogenesis. Hormones produced by the Pituitary gland.
Where are the spermatogonia located in the seminiferous tubule?
Spermatogonia rest on the basement membrane of the seminiferous tubule and divide mitotically to produce more spermatogonia and primary spermatocytes. The spermatogonia remain in the basal compartment while the spermatocytes are located in the adluminal compartment.