The document describes the anatomy of the mammary gland (breast). It discusses the location and extent of the breast, including that it lies in the superficial fascia of the pectoral region and extends from the second to sixth ribs. It outlines the structure of the breast as having fibrous, glandular, and areolar tissue components. The neurovascular supply is described as being from intercostal nerves and arteries including the axillary, internal thoracic, and posterior intercostal arteries.

1. UPPER LIMBREGIONAL ANATOMYdRsurajitkundusr. lecturerdept. of anatomymaitri institute of dental sciences & research centreanjora, durgchhattishgarh, india

2. INTRODUCTIONPARTS OF THE HUMAN BODY: HEAD NECK AND BRAIN, THORAX, ABDOMEN, EXTREMITIES (UPPER LIMB AND LOWER LIMB)UPPER LIMBHAS 4 PARTS- SHOULDER, ARM, FOREARM AND HAND

4. THE PECTORAL REGION

5. THE MAMMARY GLANDORTHE BREAST

6. INTRODCTIONPRESENT BILATERALLY IN BOTH SEXES

7. MALE AND IMMATURE FEMALES- RUDIMENTARY

8. MATURE FEMALES- WELL DEVELOPED AND BECOMES MORE PROMINENT DURING PREGNANCY AND LACTATION

9. MOST IMPORTANT STRUCTURE OF THE PECTORAL REGION

10. IT IS A MODIFIED SWEAT GLAND (APOCRINE TYPE).POSITIONLIES IN THE SUPERFICIAL FASCIA OF THE PECTORAL REGIONBUT A SMALL EXTENSION KNOWN AS AXILLARY TAIL OF SPENCEPIERCESTHE AXILLARY FASCIA THROUGH A SMALL FORAMEN KNOWN FORAMEN OF LANGER AND LIES IN THE AXILLA

11. EXTENTVERTICALLYFROM SECOND TO SIXTH RIB IN THE MID CLAVICULAR LINEHORIZONTALLYFROM LATERAL BORDER OF STERNUM TO THE MID AXILLARY LINE ALONG THE FOURTH RIB

13. RELATIONSTHE BASE OF THE MAMMARY GLAND CALLED AS MAMMARY BED RESTS UPON THE FOLLOWING STRUCTURES (FROM SUPERFICIAL TO DEEP)RETROMAMMARY SPACEDEEP FASCIA (PECTORAL FASCIA)MUSCLES- PECTORALIS MAJOR, SERRATUS ANTERIOR, EXTERNAL OBLIQUERETROMAMMARY SPACEA SPACE DEEP TO THE BASE OF THE GLAND, LIES SUPERFICIAL TO DEEP FASCIA, CONTAINS LOOSE AREOLAR TISSUE, MAKES THE GLAND FREELY MOVABLE.

14. RETROMAMMARY SPACE

15. PRESENTING PARTSNIPPLECONICAL PROJECTION IN THE CENTRE OF THE ANTERIOR PART OF THE BREAST, LIES IN THE FOURTH INTERCOSTAL SPACE, PINK IN COLOUR, HAS HIGH NERVOUS INNERVATION AND OPENINGS OF 15-20 LACTIFEROUS DUCTS.(B) AREOLACIRCULAR PIGMENTED AREA OF SKIN AROUND THE BASE OF THE NIPPLE, BECOMES DARKER DURING PREGNANCY AND LACTATION, CONTAINS MODIFIED SEBACIOUS GLANDS WHICH BECOMES ENLARGED DURING PREGNANCY AND LACTATION FORMING TUBERCLES OF MONTGOMERRY

16. STRUCTURE3 COMPONENTS(A) FIBROUS TISSUE(B) GLANDULAR TISSUE(C) AREOLAR TISSUE

17. (A) FIBROUS TISSUESUPPORTS THE ENTIRE GLANDFORMS SEPTA (SUSPENSORY LIGAMENTS OF COOPER) WHICH ANCHORS THE GLAND TO THE OVERLYING SKIN AND TO THE UNDERLYING DEEP FASCIA (PECTORAL FASCIA) AND DIVIDES THE GLAND INTO 15-20 LOBES

18. (B) GLANDULAR TISSUECONSIST OF 15-20 LOBESLOBES ARE OF TUBULOALVEOLAR TYPEEACH LOBE HAS ONE LACTIFEROUS DUCTLOBES ARE ARRANGED IN A RADIATING MANNER ARROUND THE AREOLATHE LACTIFEROUS DUCT DILATES NEAR ITS OPENING IN THE NIPPLE TO FORM LACTIFEROUS SINUS WHICH ACT AS RESERVOIR OF MILKDUCTS ARE SURROUNDED BY MYOEPITHELIAL CELLS

19. STRUCTURE OF THE MAMMARY GLAND

20. NEUROVASCULAR SUPPLY

21. ARTERIAL SUPPLYBREAST IS HIGHLY VASCULAR ORGAN. SUPPLIED BY THE FOLLOWING SETS OF ARTERIES:AXILLARY ARTERY- LATERAL THORACIC BRANCH AND SUPERIOR THORACIC BRANCHINTERNAL THORACIC ARTERY- PERFORATING BRANCHPOSTERIOR INTERCOSTAL ARTERY (2ND , 3RD, 4TH )- LATERAL BRANCH.

22. VENOUS DRAINAGEVEINS FORM AN ANASTOMOTIC VENOUS CIRCULAR PLEXUS ARROUND THE MAMMARY GLAND KNOWN AS CIRCULAR VENOSUS.VEINS FROM THIS PLEXUS ENDS IN AXILLARY, INTERNAL THORACIC AND POSTERIOR INTERCOSTAL VEINS.

23. NERVE SUPPLYINTERCOSTAL NERVES (4TH- 6TH )- ANTERIOR AND LATERAL CUTANEOUS BRANCHES.

24. LYMPHATIC DRAINAGE