HLTH1030 Lecture 22: HLTH1030-Lecture 22
7 Nov 2018
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Document Summary
Male gamete development: male gametes = spermatozoa (=sperm), produced in testicles, spermatogenesis, production of spermatozoa in seminiferous tubules (with haploid chromosome set, production of viable sperm, greatly affected by temperature, dependent on hormones. Spermatozoa: spermatozoa (sperm), head & acrosome for enzymatic penetration into the egg at fertilisation, midpiece containing the mitochondrium, tail for forward propulsion. Seminiferous tubules: septa divide testes into ~250 lobules, each lobule contains one to four seminiferous tubules, seminiferous tubules: Fertilisation: during fertilization 2 haploid chromosome sets get combined to form a diploid chromosome set in the zygote. Spermatogenesis: diploid chromosome set has to be reduced to achieve haploid chromosome set in male gametes, formation of haploid spermatids from diploid spermatogonia in a process called meiosis, stem cells enter into spermatogenesis approx. every 16 days. In the epididymis: the remodelling and maturation of spermatids into mature spermatozoa (sperm, takes ~74 days to complete, sertoli cells provide nutrients.
