Show pageOld revisionsBacklinksBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ====== BREAST ====== breast * extent of base * vertically from 2nd to 6 th ribs * horizontally from lateral border of sternum to midaxillary line * structure of breast * skin * conical projection called nipple * pierced by lactiferous ducts * contains circular and longitudinal smooth muscle * few modified sweat and sebaceous gland * rich in nerve supply * skin surrounding base of nipple * called as areola * rich in sebaceous glands * become enlarged during pregnancy and lactation to form * tubercles of montgomery * devoid of hair * parenchyma called as mammary gland * it is a compound tubuloalveolar gland * secretes milk * lies in superficial fascia with no capsule * modified sweat gland * each lobe is a cluster of alveoli * drained by lactiferous duct * stroma * forms supporting framework of gland * partly fibrous and partly fatty * fibrous stroma forms septa * suspensory ligaments of cooper * nerve supply * 4 to 6 th intercostal nerve branches * anterior and lateral cutaneous branches * secretion is controlled by hormone prolactin * secreted by pars anterior of hypophysis cerebri * development of breast * ectodermal ridge called * mammary ridge * situation * divided in to 4 quadrants * upper medial * upper lateral * extension called as * axillary tail of spence * passes through * foramen of langer * lower medial * lower lateral * deep relations * breast lies of deep fascia covering pectoralis major * deeper there are 3 muscles * pectoralis major * serratus anterior * external oblique * retromammary space * loose areolar tissue between * pectoral fascia and breast * blood supply * branches of axillary artery * superior thoracic * lateral thoracic artery * acromiothoracic * branch of subclavian artery * internal thoracic artery * lateral branches of posterior intercostal artery * lymphatic drainage * lymph nodes * lymphatic vessels * histology of breast * resting phase * lactating phase {{:anatomy:breast.png}} {{:anatomy:breast-extent.jpg}} {{:anatomy:breast-anatomy.jpg}} {{:anatomy:breast-attachments.jpg}} {{:anatomy:breast-blood-supply.jpg}} {{:anatomy:breast-deeprelations.jpg}} {{:anatomy:breast-lymph_route.jpg}} {{:anatomy:breast-lymphdrain.jpg}} en/breast.txt Last modified: 2023/06/14 09:57by 127.0.0.1