Mammary Glands PDF

BREAST Mammary Glands Prof. Dr. Selda Önderoğlu Faculty Of Medicine Dept. Of Anatomy - Located within the superficial fascia,modified skin gland - has no special capsule or sheath -capable of secreting milk-lactation - present in both sexes Weight: 150 - 200 gr 400-500 gr (in lactation)  prepub...

BREAST Mammary Glands Prof. Dr. Selda Önderoğlu Faculty Of Medicine Dept. Of Anatomy - Located within the superficial fascia,modified skin gland - has no special capsule or sheath -capable of secreting milk-lactation - present in both sexes Weight: 150 - 200 gr 400-500 gr (in lactation)  prepuberty puberty adolecsant adult Hemispheric lactation menapause pregnancy type Shapes of female breast Localization  At Pectoral region (within superficial fascia)  Level:2 (3) - 6 (7) ribs  From Sternum – to the midaxillary line.pectoral muscles (deepest ).deep Fascia.Superf. Fasc. within located the mammary glands.skin Pectoral m.  Superficial fascia  superficial fascia is divided into 2 layers  superficial layer Within:  deep layer Mammary gland  Deep layer of Superf. F. retromammary space  Deep fascia (Deep F.) supports free movement of mammary gland Retromammary space v Deep fascia located anterior to pectoralis major m.(closely adheres to it). Suspensory ligaments (of Cooper):  fibrous band that run between skin and deep fascia  supports the breast,stronger in the upper part of breast Clavipectoral fascia  ‘’deep fascia’’  project to the clavicle and attach to it.  Axillary tail -The Superolateral part of the breast which is prolonged towards the axilla -Sometimes may pierce the deep fasc. and may be close to the axillary lymph nodes.  External features  Intermammary cleft(bw R&L breast  Body of breast  Nipple (papilla mammaria)  At 4. intercostal space  Areola (areola mammae)  Areolar tubercles  Areolar(Montgomery) glands  Circular smooth muscle in nipple & areola (M. sphincter papilla).  External features  Body of breast  External features  Body of breast  Intermammary cleft  Nipple (papilla mammaria)  External features  Body of breast  Intermammary cleft  Nipple (papilla mammaria)  surrounded by colored area of skin ’Areola’’ (areola mammae)  Areola does not contain fatty(adipose) tissue  Has glands (Montgomery glands) Circular smooth muscle in nipple & areola: sphincter papilla m. Internal structure of breast ( mammary gland) It is composed of: 1. Glandular tissue 2. Fatty tissue 3. Connective tissue  Glandular tissue  Each breast consists of  15-20 lobes  “Lobes of mammary gland’’  they radiate out from the nipple  Each lobe has one lactiferous duct (drain each lobe of breast)  pass through nipple  opens on to its tip : Ostium papillare  just prior to termination of lact. Duct:lactiferous sinus or “ampulla’’ which is the dilated part of lact. duct  F: in lactation reservoir of milk Nipple 1. Glandular tissue 2. Fatty tissue 3. Connective tissue Fatty tissue  Around & btw glandular tissue  Forms Most of the breast Except lactation Arteries of breast  Lateral mammary branches (2-4posterior intercostal a.& lateral thoracic a.)  medial Mammary branches (internal thoracic a.)  thoraco-acromial a. ( axillary a.)  internal thoracic lateral thoracic artery artery Veins - internal thoracic vein - axillary vein - intercostal vein  Nn Supraclavi cular n.  Supraclavicular n  2-6 intercostal nn  anterior cutaneus br.  lateral cutaneus brs.  milk secretion is under the control of the autonomic nervous system Lymph: mainly to axillary lymph nodes 75% of lymp. drainage  Pectoral Groups of axill.lymph nodes  Subscapular  Apical Remaining lymph To:Parasternal Lymph nodes Video links: https://www.youtube.com/watch?v=t8X3w-d6NPE https://www.youtube.com/watch?v=mXYjedNTKy4 https://www.youtube.com/watch?v=4OinheT-5eA https://www.youtube.com/watch?v=kGcQZ9BvhUg Thank you Acknowledgement: I thank you to all the scientists who for their efforts of providing the knowledge used in this ppt.