The breast is normally formed of 15-20 lobes separated by ligaments of Cooper, with each lobe containing lobules. The lobes and lobules drain into 15-20 lactiferous ducts that open into the nipple. The breasts develop from birth through puberty and are affected by hormones such as estrogen, progesterone, prolactin, and oxytocin during pregnancy and lactation. The breasts receive nerve innervation from cutaneous branches of the 4th through 6th intercostal nerves. Common breast conditions include lumps, changes in skin texture, unilateral cancer, secondary deposits from other cancers, lack of breast development, extra nipples, and supernumerary breasts.

8.  Breast of both sides are of equal in size.
 If one is larger and lower that will be on the
right side.

9.  Nipple
 Areola

11.  It is formed of 15-20 lobes.
 Each lobe is formed of a
number of lobules.
 The lobes and lobules are
separated by interlobar and
interlobular fibrous & fatty
tissue, called ligaments of
Cooper. (Importance)?These
ligaments give the breasts support by connecting the skin
of the breasts to the pectoralis muscles below them.
 It has from 15-20 lactiferous
ducts which open by the
same number of openings
on the summit of the nipple.

12.  From birth to pre-puberty life
 At puberty
 In pregnancy
 During lactation
 After lactation

13.  OESTROGEN
 PROGESTERONE
 BOTHTHE HORMONES
 PROLACTIN AND GROWTH HORMONES
 OXYTOCIN

16.  ANTERIOR AND LATERAL CUTANEOUS
BRANCH FROM 4TH TO 6TH INTERCOSTAL
NERVES.

19.  BREAST LUMP
 PEAU D’ ORANGE
 UNILATERAL CANCER BREAST
 SECONDARY DEPOSIT
 AMASTIA
 POLYTHELIA
 POLYMASTIA