Transcript
SPERMATOGENESISDr SIVARAJ S
DEPT OF PHYSIOLOGYALL INDIA INSTITUTE OF MEDICAL SCIENCES
NEW DELHI
The process by which sperm develop to become mature sperm, capable of fertilizing an ovum
SPERMATOGENESIS
SPERMIOGENESIS
Testis and surrounding structures
Further development of SpermatozoaMobilityCapacitation
Role of Leydig cellsSecreting male sex hormone testosterone
Role of Sertoli cells
Also called Nurse cellsProvides nutrition Blood Testis BarrierSecretes ABP, inhibin, Mullerian inhibiting substance(MIS)
Interrelationships between the hypothalamus, anterior pituitary, and testes
Semen
Volume 1.5- 4.5 mlWhite, opalescent
colourSlightly alkaline pH100-125 million
sperms/ml
Influencing factorsEndocrine environmentTemperature Dietary factors vitamin A,B,ERadiation exposureSmoking, Alcohol Infectious diseases
Summary SpermatogenesisProduce mature spermatocytesProduce haploid gamatesCell proliferationMaintenance of a reserve germ cell
populationSpermatids mature into spermatozoaAcquire motility Capable of fertilizing ovum.
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