Spermatogenesis: menene menene kuma yadda mahimman matakai ke faruwa

Wadatacce

• Babban matakan spermatogenesis
• 1. Yanayin Germinative
• 2. Lokacin girma
• 3. Ripening lokaci
• 4. Banbancin lokaci
• Yadda ake sarrafa kwayar halittar maniyyi

Spermatogenesis ya dace da tsarin samar da maniyyi, wanda sune tsarin halittar maza da ke da kwayar halittar kwai. Wannan tsari yakan fara ne kusan shekara 13, ana ci gaba dashi tsawon rayuwar mutum kuma yana raguwa a lokacin tsufa.

Spermatogenesis wani tsari ne wanda ake sarrafa shi ta hanyar hormones, kamar su testosterone, horon luteinizing (LH) da kuma kwayar cutar mai motsa jiki (FSH). Wannan tsari yana faruwa kullun, yana samar da dubban maniyyi a kowace rana, wanda aka adana a cikin epididymis bayan samarwarsa a cikin gwajin.

Babban matakan spermatogenesis

Spermatogenesis tsari ne mai rikitarwa wanda yake tsakanin kwanaki 60 da 80 kuma ana iya raba shi cikin stepsan matakai:

1. Yanayin Germinative

Lokacin yaduwar kwayar halitta shine kashi na farko na kwayar halittar maniyyi kuma yana faruwa ne lokacin da kwayoyin kwayar halittar lokacin amfrayo suka je wurin kwayayen, inda suke zama basa aiki kuma basu balaga ba, kuma ana kiransu spermatogonias.

Lokacin da yaro ya balaga, maniyyi, a ƙarƙashin tasirin kwayar halitta da ƙwayoyin Sertoli, waɗanda suke cikin ƙwarjin, suna haɓaka sosai ta hanyar rabewar sel (mitosis) kuma suna haifar da na farko na spermatocytes.

2. Lokacin girma

Abubuwan farko na spermatocytes da aka kirkira a cikin yanayin yaduwar cuta suna karuwa cikin girma kuma ana aiwatar dasu na meiosis, don haka kwayar halittar su ta ninka, ta zama sanannen spermatocytes na biyu.

3. Ripening lokaci

Bayan samuwar spermatocyte na biyu, tsarin balaga yana faruwa don haifar da kwayar halittar mahaifa ta rabe rabe.

4. Banbancin lokaci

Yayi daidai da lokacin canzawar maniyyi zuwa maniyyi, wanda yakai kimanin kwanaki 21. Yayin lokacin rarrabewa, wanda kuma ana iya kiran sa spermiogenesis, an kirkiro mahimman abubuwa biyu:

• Acrosome: wani tsari ne wanda yake a cikin kwayar halittar maniyyi wanda yake dauke da enzymes da yawa wanda yake ba da damar maniyyin ya shiga kwai mace;
• Bulala: tsarin da ke ba da izinin motsi na maniyyi.

Duk da ciwon tambari, maniyyin da aka samar bashi da wata ma'ana har sai sun tsallake epididymis, yana samun karfin motsawa da damar hadawa tsakanin awanni 18 da 24.

Yadda ake sarrafa kwayar halittar maniyyi

Spermatogenesis yana sarrafawa ta yawancin hormones wanda ba kawai yana son ci gaban gabobin jima'i na maza ba, har ma da samar da maniyyi. Daya daga cikin manyan kwayoyin shine testosterone, wanda shine kwayar da kwayoyin Leydig ke samarwa, wadanda sune kwayoyin dake cikin gwajin.

Baya ga testosterone, luteinizing hormone (LH) da follicle stimulating hormone (FSH) suma suna da matukar mahimmanci wajen samar da maniyyi, kamar yadda suke zuga kwayoyin Leydig don samar da kwayoyin testosterone da Sertoli, don haka akwai canjin spermatozoa a cikin spermatozoa.

Fahimci yadda tsarin kwayar halittar namiji yake aiki.