Embryonic Breast Development - Ukwakhiwa kuya emavikini angu-12
Ukuthuthukiswa kwesisu kuqala phakathi nesonto lesine lokubeletha nokukhula kwesisekelo somsana wobisi. Imigqa yobisi, noma "imigwaqo ye-ventral epidermal," ibonakala ngesonto lesithupha lempilo "yombungu". Bese bephuma phansi emgodleni kuya ekuhlungeni kwezinhlangothi zombili. Isifuba siqala eduze komgwaqo phezu kwesifuba, futhi ingxenye esele ye-ridge, ingxenye enkulu, ihlukana.
Embryonic Breast Development - amaviki angu-12 kuya kwangu-40
Phakathi kwamasonto angu-12 kuya kwangu-16 ukubeletha, amangqamuzana akhethekile aguqula ngisho nangaphezulu emsimbeni oshelelayo we-nipple ne-areola. Kuleli qophelo, amafulethi omumfomfomu akha futhi adala amakhekhe ebisi avela kumaseli asondelene ndawonye. Ama-hormone e-sex e-placenta angena ekujuleni kwe-fetal futhi alawule ukuthuthukiswa kwesifuba; lokhu kuhlala kuze kube amasonto angu-32 ukubeletha. Khona-ke, kusukela emasontweni angu-32 kuya kwangu-40, amathanga ebisi, ane- colostrum , ifomu ngaphakathi kwe-ingono.
Ukuthuthukiswa kweBabyid Breast - amaviki angu-40 ukuya ekuzalweni
Emasontweni okugcina okukhulelwa, usayizi we-fetal mammary gland ukhula izikhathi ezine ngokulingana nobukhulu bawo bokuqala, futhi ingono ne-areola zikhula nakakhulu futhi zibe mnyama. Ekubelethweni, izingxenye ezikhona kuphela ezikhona zesifuba sebele ziyizinkoma zobisi ngaphakathi kwe-ingono - ama-alveoli, noma amaseli okhiqiza ubisi - azange akhiwe futhi akukho izinguquko eziningi ezizokwenzeka manje kuze kube sekuqaleni kokukhulelwa.
Ngemuva kokubeletha, izicubu zezinsana ezisanda kuzalwa zingase zifake i-colostrum.
Izinguquko zesisu ngesikhathi sokuzalwa
I-Estrogen, i-hormone eqala ukukhulelwa emantombazaneni, ibangela ushintsho lwebele. Ukukhula komzimba kwenzeka ngokuvamile ngenxa yokuqoqwa kwamafutha amaningi. Uhlelo lokudoba nalo luyaqhubeka futhi lusakazeka, futhi amaqembu amancane amangqamuzana, aminyene amafomu ekupheleni kwe-duct.
Lezi yi-alveoli yesikhathi esizayo. Ukuthuthukiswa okujwayelekile kwamabele kubonakala phakathi kweminyaka eyi-10 kuya ku-11, kepha ububanzi obujwayelekile buphakathi kweminyaka engu-8 kuya kweyishumi nambili.
Ukushintsha Kwebele Ngesikhathi Sokuya esikhathini
Phakathi nomjikelezo ngamunye wokuya esikhathini, ukuvuthwa nokukhula okujulile kwezicubu zokudoba kwenzeka ngesikhathi izigaba ze-follicular kanye ne-ovulatory, ezifinyelela esigabeni sokugcina se-luteal bese zihamba. Ngesikhathi umjikelezo ngamunye we-ovulatory, amazinga aphezulu we-ovarian steroids, ikakhulukazi i-progesterone, akhuthaza ukukhula okubambile okungeke kubuyele kulokho okwakukhona kulo mjikelezo wangaphambili. Ukuthuthukiswa okuphelele komsebenzi we-mammary kukhona kuphela lapho ukhulelwa.
Ukwenziwa kohlobo lwe-Breast Tissue
Isifuba sakhiwa ngezinhlobo ezintathu zamathishu: ama-glandular, fibrous (kufaka phakathi imigqa emisiwe ) ne-adipose (noma amafutha) amathishu. Inani elilinganiselwe lezinhlayiya ezinamahlombe, ama-fibrous, kanye ne-adipose zishintsha ngokukhula, umjikelezo wokuya esikhathini, ukukhulelwa, nesimo somsoco.
I-Anatomy ye-Breast Adult
Ngaphakathi kwezicubu zesifuba ezivuthiwe, izakhiwo ezibalulekile zikhona. Lokhu kufaka:
- i-alveoli , noma amasaka amancane lapho ubisi lugcinwa futhi bugcinwe khona
- amangqamuzana angama-myoepithelial , azungeze i-alveoli kanye nenkontileka ukuze ubisi luphoqelelwe ngaphandle emathangeni obisi
- amadoksi nemikhakha , ehlanza ubisi e-alveoli
- izono ezinomsoco , noma izandiso zamadada ngaphansi kwe-orola egcina ubisi
- lobes , noma inethiwekhi ye-branching yazo zonke izakhiwo ezibalwe ngenhla; isifuba ngasinye sinama-about 20, siphela ku-ingono.
Ezinye izingxenye ezibalulekile zebele
- I-Cooper's ligaments
- Umsila we-axillary , noma ingxenye yesikhumba se-mammary eseza emgqeni
- Ukunikezwa kwegazi , okuvela emithonjeni ethile yamathambo
- I-Musculature
- Ukubhuka , noma ukuhlinzeka ngamanzini
- I-Lymph supply and drainage : Izitsha ze-Lymphatic zithutha lamanzi ahambayo avela egazini nasemzimbeni omswakama. I-lymph isuswa emgodini we-mammary kanye nezicubu ezizungeze yizigaba ezimbili zezitsha ze-lymphatic - enye yesikhumba; enye ingokwesibele sangempela, ingono kanye ne-areola.
Ukubukeka kwebele
Amabele ahlukahluka kowesifazane kuze kube ngowesifazane. Izingxenye zesifuba ezibonwa ngamehlo ziwu-symmetry; usayizi we-ingono nokuma; umbala we-asolar, usayizi nokuma, kanye ne-Montgomery Glands (ama-bumps amancane amancane kwi-areola efihla amafutha emvelo ukuze agcobe indawo futhi asize ukuvimbela amabhaktheriya ekuzaleni.)