Ama-ovariyo yinxalenye ebalulekileyo yophuhliso oluqhelekileyo kunye nomsebenzi wokuzala oomama.
I-Anatomy yama-Ovari
Ii-ovane zimbini zeengqungquthela (malunga nobukhulu kunye nomlo we-almond) kwindlela yokuzala isetyhini apho amaqanda agcinwa kwaye i-estrogen yenziwe. Zibanjwe endaweni ngamagqabana amaninzi ngapha nangapha kwesibindi. Amaqanda athatyathwa ukusuka kuma-ovari ukuya kwisibeleko ngokusebenzisa iibhulo ezikhohlakeleyo.
Ukujikeleza umnyango wee-tublopian tubes yincinci ye-fimbriae, okanye i-projections efana neminwe, ekhokela iqanda kwi-tube nganye nyanga.
Ama-Ovane ngokusebenzisa iMpilo
Ibhinqa lizalelwa onke amaqanda awaya kulufuna, malunga neyesigidi enye kwi-ovari nganye. Ngobuntwaba, xa uya kufumana ikhefu lokuqala , inani lamaqanda kwi-ovary ngalinye lijikeleze i-200,000 ukuya ku-400,000. Ngexesha lokuzala kwakhe, amaqanda angama-300 ukuya kuma-500 aya kuphuhliswa aze akhululwe ngexesha lokuvuthwa. Emva kokumisa umva, ama-ovari ayayeka ukuvelisa amaqanda, kunye ne-atrophy (yehla). Ngenxa yokulahlekelwa kwe-ovarian kunye nokulahleka kwemveliso yes estrogen, abafazi be-postmenopausal bavame ukufumana iimpawu ezifana nokutshisa okutshisa kunye nokomama wesisu. Ukuntuleka kwe-Estrogen kwandisa ubungozi besifazane ekuphuhliseni i-osteoporosis, okwandisa umngcipheko weethambo.
I-Ovaries 'Indima kwixesha lokuya esikhathini
Nangona iimijikelezo zingenako ukungaqhelekanga ekuqaleni, ekugqibeleni ziya kuba zihlala rhoqo kunye neentsuku ezingama-28 phakathi kweentsuku zokuqala zexesha ngalinye.
Ngenyanga nganye, malunga ne-10 ukuya kwe-12 iifollic zeqanda ziya kuqala ukuphuhlisa. Omnye uza kuqhubeka ekuveleni iqanda elivuthiweyo. Bonke abanye baya kuphinda bahlaziywe kwiimpawu ze-ovari. Ngeentsuku ezili-14 ukuya kumjikelo wesifazane, olo liqanda elivuthiweyo liya kukhutshwa kwinkqubo eyaziwa njenge-ovulation. Emva kokuba kuqhutywe i-ovulation, i-follicle engenanto iyaziwa njenge-corpus luteum.
Kuya kuvelisa i- progesterone kunye namanye ama-hormone ebalulekileyo ekukhuleleni malunga neentsuku eziyi-14.
Iprogesterone inceda ukulungiselela nokukhupha umgca wesibeleko sokufakela ukutsalwa xa ukuchumisa kweqanda ngeesilisa kubonakala. Kwakhona, ukuba ukuchumisa kwenzeka, le inkxaso ye-hormone iya kuqhubeka ngokukhulelwa ukukhusela amanye amaqanda ekukhuleni. Ukuba ukuchumisa akunakwenzeka, amazinga e-progesterone aya kunqamuka, i-corpus luteum iya kuphazamiseka, kwaye ukuya esikhathini kuya kuqala.
Umsebenzi weHormonal wama-Ovane
Ama-ovari ayanelisekile kwimiphumo kunye neenguqu ze-endocrine okanye i-hormonal system. Baphendula kwaye bavelise ama-hormone abo njengoko kufuneka umzimba. Enyanisweni, indima yesibini ebalulekileyo ye-ovary kukwazisa i-hormone yesini-isrogen, i-progesterone, kunye ne-orrogens encinane kakhulu, eyenza ukuba iimpawu zesini zesini zenzeke kwaye zigcinwe.
Ukongeza, ii-ovari ziyaphendula kwi- FSH ne-LH eziveliswa ngumnci omncinci kwingqondo ebizwa ngokuba yi-pituitary gland. I-FSH, okanye i-follicle evuselela i-hormone, ibangela ukuba i-estrogen iphakame kwaye iqela lee-follicle zeqanda likhule ngenyanga. Njengoko inye follicle iya kuba namandla kwaye ifinyelele ekuvuthweni, inqanaba eliphezulu le-estrogen liza kwenza i-LH (i-hormone i-luteinizing) iqhube, iqhube i-ovulation.
Ngaphantsi
Ama-ovari kunye nama-hormone abavelisayo (ngokukodwa i-estrogen kunye ne-progesterone) badlala umsebenzi obalulekileyo ekuguga kwabasetyhini.
Umthombo:
I-North American Menopause Society. (2014). UmSebenzi wokuNqumla umNxeba: Isikhokelo seNtsholongwane, 5. Ii-Heights Heights, OH: I-North American Menopause Society.