Galactic, the nourishment with best darling. The arrival of darling, of new mother galactic arise subsequently, why?
One, about the breast.
Mammary function is secrete breast, platoon breast and lactation maintain, its submit two hemisphere form, be located in pectoralis major simple table, the 2nd ～ between the shallow, depth of film of easy veins that stand out of 6 costal levels. The tit is located in mammary center, ad cool-headed area is pigment all round breast is dizzy. The breast is comprised by connective tissue of body of gland of the skin, mammary gland, support and adipose organization, among them bubble of mammary gland flocculus, tracheal, gland is the part with the mainest breast. Among them, the development process of mammary gland needs a lot of hormone to participate in, the mainest effect is estrogen and progestational hormone.
Mammary size does not decide how many galactic, however by adipose how many decision, and the galactic growth that more or less provides with mammary gland, mammary gland is concerned.
2, why galactic be generation of the ability after giving birth to the child?
Because cent of mammary gland activity is two period,this is, dormant period with the activity period. Time of human body great majority does not need lactation, mammary gland need not work in this period, long developmental process brings up time of mammary gland great majority to be in dormant, and once be needed, begin to run immediately, this kind of magical mode, make female body unapt be in the condition of exhaustion of nutrient outflow as a result for a long time, also make sure the child can drink mother milk in crucial period.
1, dormant period -- dormant period mammary gland is to point to not the mammary gland of pregnant female, gland body is underdeveloped, see a few conduit and small gland pickle only, adipose organization and connective tissue are rich, after oviposit, gland bubble and conduit somewhat proliferous.
2, mobile period -- gestation falls in the action of estrogen and progestational hormone, the little vessel of mammary gland and gland bubble are rapid and proliferous, gland bubble increases, epithelial for monolayer columnar or cubic cell, connective tissue and adipose organization decrease accordingly. To gravid later period, in hypophysis excretive influence of the hormone that urge breast falls, gland bubble begins to secrete. Mammary gland is secretory carrying an oar on the head, protein of fat drop, milk, breast is contained to breathe out in secretion antibody, call colostrum. Still have inside colostrum gobble up adipose huge bite cell, call colostrum small system.
Structure of lactation mammary gland and gestation mammary gland are similar, but gland system growth is better, gland bubble antrum increases. Gland bubble is in different exudation period, some gland bubble are shown secrete early days, gland cell shows bubble of gland of some of; of Gao Zhu shape to be in secrete later period, the cell submits cubic form or compressed form, gland antrum is full of galactic, net of wide range endoplasm and line bead body are contained a lot ofto wait inside gland cell, show the gland that secretes condition there is a lot of exudation inside the cell grain and fat drop.
The place on put together is narrated, galactic generation, it is in pregnancy, mammary gland hyperplasia, breast, tit increases accordingly, the change of hormone level breeds for secrete secrete breast of the organization made preparation. 2 it is childbirth hind, when infantile absorb tit, stimulated the nerve ending of the tit, these nerve pass information to pituitary, made generation urges lacteal white, make gland cell lactate of the breast, galactic arrive at a tit by lacteal conduit again. Darling is seasonable absorb tit is large good part.
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