Dab tsi yog tsim los ntawm spermatogenesis?

Video: Dab tsi yog tsim los ntawm spermatogenesis?

2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44

Spermatogenesis yog cov txheej txheem uas haploid spermatozoa tsim los ntawm cov kab mob hauv cov tubules seminiferous ntawm testis. Yog li, thawj spermatocyte muab nce mus rau ob lub hlwb, qhov thib ob spermatocytes , thiab ob theem nrab spermatocytes los ntawm lawv qhov kev faib tawm tsim tawm plaub spermatozoa thiab plaub haploid cells.

Kuj paub yog, dab tsi yog cov khoom lag luam ntawm spermatogenesis?

Ob lub haploid spermatids (haploid hlwb) yog tsim los ntawm txhua qhov thib ob spermatocyte, uas ua rau tag nrho plaub spermatids. Spermiogenesis yog theem kawg ntawm spermatogenesis , thiab, thaum lub sij hawm no, spermatids mature rau spermatozoa (sperm cells) (Daim duab 2.5).

Ib yam nkaus, yuav ua li cas gametes tsim tawm hauv spermatogenesis? Hauv spermatogenesis ua, diploid spermatogonia hla dhau mitosis kom txog thaum lawv pib txhim kho rau hauv cov gametes ; Thaum kawg, ib qho kev loj hlob mus rau hauv thawj spermatocyte uas yuav dhau los ntawm thawj meiotic faib los ua ob haploid theem nrab. spermatocytes.

Tom qab ntawd, ib tug kuj yuav nug, pes tsawg phev yog tsim los ntawm spermatogenesis?

Hauv tib neeg, kev txhim kho spermatic yuav siv sijhawm ze li ob zaug los ua kom tiav. Vim tias hom A₁ spermatogonia yog stem cells, spermatogenesis tuaj yeem tshwm sim tsis tu ncua. Txhua hnub, qee qhov 100 lab phev yog tsim nyob rau hauv txhua tus tib neeg testicle, thiab txhua ejaculation tso tawm 200 lab phev.

Thawj spermatocytes tsim tawm li cas?

Thawj thiab theem nrab spermatocytes tau tsim los ntawm cov txheej txheem spermatocytogenesis (Daim duab 3). Thawj spermatocytes yog diploid (2N) hlwb. Tom qab Meiosis I, ob theem nrab spermatocytes raug tsim. Secondary spermatocytes yog cov hlwb haploid (N) uas muaj ib nrab ntawm cov chromosomes.

Pom zoo:

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