Breast internal structure do you understand
Breast mainly from the ceruminous gland ketone body, catheter, adipose tissue and the fiber organize etc. composing.It is internal the structure be a like small tree which pours growth.
The breast ceruminous gland ketone body constitutes to°from 15~20 ceruminous gland leaf, fronds, each ceruminous gland leaf, frond is divided into some glandular lobules, and each glandular lobule constitutes to°from 10~100 acinuses again.These acinuses closely arrange surroundings at the small mammary ridge palatine canal, the openings of acinus and small mammary ridge palatine canal connect with each other.Many small mammary ridge palatine canals gather together into a leaflet mammary ridge palatine canal, several mammary ridge palatine canals again gather together further one radical the whole mammary gland catheter of ceruminous gland leaf, frond, again lactiferous ducts.The lactiferous ducts is total 15~20 radicalses, take nipple as center to present to project form alignment, gather together at the areola mammae, open mouth at the nipple and lose the mammary ridge pore, porus at be called.The lactiferous ducts is more narrow in the nipple, greatly be called a lactiferous sinuses for the ampulla, bulb after its Peng, there is the action of storage human milk.The openings of mammary gland catheter is a stratified squamous epithelium cell, narrow place in order to move form epithelium, the ampulla, bulb following all levels catheter is a pair of stratum, stories columnar epitheliums or simple columnar epithelium, eventually the end catheter near acinus is a cuboidal epithlium, the cuboidal epithlium of the acinus inner pad.
The nipple surface overjet replies the stratum, story scale form cutin epithelium and the epithelium stratum, story is very thin.The nipple constitutes to°from the fine connective tissue and the smooth muscle.The smooth muscle presents circumduction or projects form alignment and be to have a machine stimulation, smooth muscle contraction, can make nipple erection, and squeeze catheter and lactiferous sinus to eject its contents thing.The areola mammae department skin hairiness delivers demulcent therapy, reconciliation ceruminous gland ketone body.The ceruminous gland ketone body contains sweat gland, sebaceous gland and mammary gland.Its sebaceous gland calls an areolar glands again, bigger but the form be shallow, the discharge, secretion has protection skin, lubricate nipple and infant oral lips of action.
The adipose tissue in the breast presents a capsule form to wrap at the mammary gland surroundings and become a hemisphere form of whole, the adipose tissue of this stratum, story capsule form is called a fatty renal capsule, adipose capsule.The degree of thickness of fatty renal capsule, adipose capsule can because of the age, grow etc. the reason individual difference be very old.Adipose tissue of how much is one of the important factors which decides a breast size.
The mammary gland is located on the of superficial layer and deep layer that the bark descends a superficial fascia.The superficial fascia stretches toward the interlobular septum of formation funiculus form inside the mammary gland tissue, on carrying to connect at the pectoral fascia, another a carry connect at the skin, the mammary gland ceruminous gland ketone body enzyme immobilization is in the thoracic subcutaneous tissue.These there is support action and fixedly breast position of the fibers connective tissues be called breast to hang ligament or the Cooper ? s ligament.The superficial fascia deep layer is located on the deep side of mammary gland, with the superficial layer of pectoralis major iliac fascia of have loose tissue connect with each other, after calling breast interspace.It can make breast since opposite enzyme immobilization, have certain translation on the thoracic cavity wall again.Sometimes, parts of mammary gland ceruminous gland ketone bodies can cut through puff tissue but go deep into a pectoralis major superficial layer and therefore make a breast carcinoma to cure for good Shu, in response to cut off pectoralis major iliac fascia and muscle along together.
The breast is greatly part of to be located on a pectoralis major surface, it the deep leontiasis ossea be lateral to be located on serratus anterior surface, seamy side and inferior part to be located on obliquus externus abdominis and the surface of rectus abdominis iliac fascia.
In addition to above structure, the breast still distributes abundant blood vessel, lymphatic vessel and sacral nerve, have Nutrition action to mammary gland and maintain a metabolism action, and have important surgery meaning.The breast iliac artery supply mainly comes from:The intercostal branch of the branch, internal thoracic artery and the intercostal and afferent perforating branches of the descending aorta of axillary artery.Breast venous return cent deep and shallow 2 sections:The superficial vein distribution much gathers together inside the mammary ridge iliac vein and the anterior jugular vein under the breast bark;The deep vein infuses into internal thoracic veins, intercostal iliac vein and each genus of axillary vein to pay respectively, then remits the innominate iliac vein, azygos vein, hemiazygous vein, axillary vein…etc..When the occurrence breast carcinoma blood goes transfer, getting into cancer cell or cancer that the blood go to bolt can get into superior vena cava through an above path and the transfer of lungs or other parts happen;It may also Be got into ridge vertebral vein plexus by intercostal iliac vein, the transfer of skeleton or centrally acting adjuvant happen.The breast lymph leads to flow to mainly have a following path:Axillary fossa lymph node, inside mammary ridge lymph node, clavicle bottom/top lymph node, abdominal wall lymphatic vessel and two mammary ridge barks descend the transportation of lymphoid net.Among them, mammary ridge lymph node inside the demulcent therapy, reconciliation of the axillary fossa lymph node is most important, they are the breast carcinoma lymphoid transfer the first station.Breast sacral nerve from 2~6 the collateral s of intercostal nerve skin and cervical plexus 3~4 control.In addition to sensory nerve, still there is sympathetic nerves fiber walking to go a distribution to organize at the nipple, areola mammae and the mammary gland with the blood vessel.The nerve ending of nipple, areola mammae is abundant, feel sharp, occurrence nipple rhagades, the ache is violent.In addition, when the experienced breast carcinoma cures for good Shu, also need to involve brachial plexus sacral nerve, thoracodorsal nerve and the anatomy of long thoracic nerve.
Perhaps, you will feel these knowledges are too abstruse, know not to know to also have no what use.In fact and otherwise, these internal structures of understanding breast, will contribute to the understanding which deepens process and pathologic variety to the breast physiology, can betterly prevent and cure breast disease.Therefore, not only is a professional personnel, and the common run of people should also know the knowledge, everyone’s joint effort concerning breast, the paroxysm prevention and cure of the exaltation breast level.
