Isebenza njani inkqubo yokuzala eyindoda

Umxholo

• Athini amalungu obuni besini
• 1. Isikram
• 2. Amatyhalarha
• 3. Idlala kwincindi yamadlala
• 4. Umthondo
• Ulawulo lweHormone lusebenza njani

Inkqubo yokuzala eyindoda ibangelwa siseti yamalungu angaphakathi nangaphandle, akhupha iihomoni, i-androgens, kwaye zilawulwa yingqondo ngehypothalamus, ekhupha ihomoni ekhupha i-gonadotropin kunye ne-pituitary, ekhupha i-hormone evuselelayo kunye ne-luteinizing hormone .

Iimpawu eziphambili zesondo, ezibandakanya amalungu esini obudoda, zenziwa ngexesha lokukhula komntwana kwaye ezesibini zenziwa ukusuka ebusheni, phakathi kweminyaka eyi-9 kunye ne-14, xa umzimba wenkwenkwe uba yindoda eyindoda, apho amalungu esini obudoda akhula khona, kunye nokubonakala kweendevu, iinwele kuwo wonke umzimba kunye nokuqina kwelizwi.

Athini amalungu obuni besini

1. Isikram

Isikram sisingxobo sesikhumba esixakekileyo, esinomsebenzi wokuxhasa amasende. Zahlulwe nge septum, eyenziwe ziithishu zemisipha kwaye xa ingena, ibangela ukushwabana kwesikhumba samatyhalarha, nto leyo ebaluleke kakhulu kulawulo lobushushu, kuba ikumatyhalarha apho kuveliswa khona amadlozi.

Isingxobo samatyhalarha siyakwazi ukugcina iqondo lobushushu kumatyhalarha lingaphantsi kobushushu bomzimba, nanjengoko lingaphandle komqala. Ukongeza, kwezinye iimeko, ezinjengokubhencwa yingqele, umsipha we-cremaster, ofaka isingxobo samatyhalarha nokumisa ityhalarha, uphakamisa amasende ngexesha lokuvezwa yingqele, ukuthintela ekupholiseni, okwenzeka kwakhona ngexesha lokuvuka ngokwesondo.

2. Amatyhalarha

Ngokwesiqhelo amadoda anamasende amabini, angamalungu anemilo embhoxo kwaye anomlinganiso omalunga ne-5 cm ubude ne-2.5 cm ububanzi lilinye, anobunzima obuli-10 ukuya kwi-15 yeegram. La malungu anomsebenzi wokufihla iihomoni zesini ezichaphazelekayo kwi-spermatogenesis, equlathe ukwenziwa kwesidoda, kunye nokukhuthaza ukukhula kweempawu zesini sendoda.

Ukusebenza kwamatyhalarha kuchatshazelwa yinkqubo ye-nervous system, ngokusebenzisa i-hypothalamus, efihla i-gonadotropin-releasing hormone (GnRH), kunye ne-pituitary, ekhupha i-follicle-stimulating (FSH) kunye ne-luteinizing (LH) hormone.

Ngaphakathi kwamatyhalarha, kukho iishubhu zesiniferi, apho ukwahlula-hlulwa kweeseli zentsholongwane kwi-spermatozoa kuyenzeka, emva koko kukhutshwe kwisikhanyiso seetyhubhu kwaye kuqhubeke nokukhula kwindlela yabo ngemibhobho yenkqubo yokuzala. Ukongeza, ii-tubules ezinesinifous nazo zineeseli ze-Sertoli, ezijongene nesondlo kunye nokuvuthwa kweeseli zentsholongwane, kunye nethishu yangaphakathi ejikeleze ezi tubules iqulethe iiseli zeLeydig, ezivelisa i-testosterone.

3. Idlala kwincindi yamadlala

La madlala anoxanduva lokufihla incindi yobudoda, ebaluleke kakhulu ekuhanjisweni nasekutyeni kwesidoda nakwithambiso lobudoda:

• Iingubo zomzimba:zizakhiwo ezingasemva kwesiseko sesinyi kunye naphambi kwerectum kwaye zivelisa ulwelo olubalulekileyo ukulungisa i-pH ye-urethra emadodeni kunye nokunciphisa i-asidi yenkqubo yesini yabasetyhini, ukuze ihambelane nobomi yesidoda. Ukongeza, ine-fructose ekwakhiweni kwayo, ebalulekileyo ukuvelisa amandla okusinda kunye ne-locomotion, ukuze bakwazi ukuchumisa iqanda;
• I-Prostate:Olu lwakhiwo lubekwe ezantsi kwesinyi, lujikeleza yonke i-urethra kwaye lufihla ulwelo olunobisi olunegalelo ekunqandeni emva kokuphuma. Ukongeza, ikwaqulathe izinto ezisetyenziselwa ukuveliswa kwamandla, ezithi zenze igalelo ekuhambeni nasekusindeni kwamadlozi.
• Amadlala ebulbourethral okanye amadlala eCowper: la madlala abekwe ezantsi kweprostate kwaye anemibhobho evulekileyo kwinxalenye yesiponji ye-urethra, apho ikhupha into enciphisa ubumuncu bomchamo obubangelwa kukudlula komchamo. Le nto ikhutshwa ngexesha lokuvuselela inkanuko yesini, ekwanomsebenzi wokuthambisa, ukuququzelela ukulala ngesondo.

4. Umthondo

Ilungu lobudoda sisakhiwo esenziwe ngesilinda, esenziwe yimizimba ye-cavernous kunye nemizimba eponjiweyo, ejikeleze urethra. Kwiphepha elikude lobudoda, kukho glans, egqunywe lijwabi, elinomsebenzi wokukhusela lo mmandla.

Ukongeza ekuququzeleleni ukuphuma komchamo, incanca ikwanomsebenzi obalulekileyo ekwabelaneni ngesondo, onesikhuthazo esibangela ukwanda kwemithambo yayo enkcenkceshela imizimba ye-cavernous kunye ne-spongy kwaye ibangele ukonyuka kwenani legazi kulo mmandla, ukwakhokelela ukuya ekuqineni kwelungu lobudoda, ukuququzelela ukungena kwalo kumsele wangasese ngexesha lokwabelana ngesondo.

Ulawulo lweHormone lusebenza njani

Ukuzala kwamadoda kulawulwa zihomoni ezikhuthaza ukukhula kwamalungu okuzala, ukuveliswa kwesidoda, ukukhula kweempawu zesondo zesibini kunye nokuziphatha ngokwesondo.

Ukusebenza kwamatyhalarha kulawulwa yihypothalamus, ekhupha i-hormone ekhupha i-gonadotropin (GnRH), evuselela idlala lengqula ukuba likhuphe i-hormone ye-luteinizing (LH) kunye ne-follicle-stimulating hormone (FSH). Ezi hormone zisebenza ngokuthe ngqo kwitestamente, ilawula i-spermatogenesis kunye nemveliso ye-androgen, i-estrogen kunye neeprogesterone hormone.

Phakathi kwale yokugqibela, iihomoni ezininzi emadodeni zi-androgens, kunye ne-testosterone yeyona nto ibaluleke kakhulu kwaye inxulumene nokuphuhliswa kunye nokugcinwa kweempawu zesini samadoda, ikwachaphazela ukwenziwa kwesidoda.

I-Androgens ikwanefuthe kuphuhliso lweempawu zesondo eziziiprayimari neziziisekondari. Iimpawu zesini ezisisiseko, ezinje ngamadoda angaphandle nangaphakathi ezesondo, ayenziwa ngexesha lokukhula kombungu kunye neempawu zesini zesibini ziyaphuhliswa ukufikisa.

Ukufikisa kwenzeka nge-9 ukuya kwi-14 yeminyaka ubudala, kukhokelela kutshintsho kubume bomzimba, ukukhula kweendevu kunye neenwele zasesidlangalaleni kunye nawo wonke umzimba, ukuqina kweentambo zezwi kunye nokuvela komnqweno wesini. Ukongeza, kukwakho nokukhula kwelungu lobudoda, iscrotum, ii-vesicles zamadlozi kunye neprostate, ukonyuka kwencindi ye-sebaceous, ejongene namabala.

Jonga ukuba isebenza njani inkqubo yokuzala yabasetyhini.