Week 10 - Breasts and Genitalia Flashcards
Axillary Tail of Spence
Axillary Process
Breast tissue projecting laterally and up into the axilla
Areola
Surrounds nipple for 1-2cm radius
Contain Montgomery’s glands (aka areolar glands)
Contain muscle fibres causing nipple erection when stimulated
Montgomery’s glands
Areolar Glands
Small, sebaceous glands
Secrete protective lipid material during lactation
Location of the breasts
Between the 2nd and 6th ribs
Composition of the breast (4)
- glandular tissue
- fibrous tissue
- suspensory ligaments
- adipose tissue
The proportion of these tissues varies depending on age, cycle, pregnancy, lactation, and nutritional state
Breast Alveoli
Milk glands in the breast lobules
Lactiferous ducts
Milk collecting system from the lobes that converges (15-20 ducts) at the nipple
Cooper’s ligaments
Suspensory ligaments that attach the breast to the chest wall
Become contracted during breast cancer
Adipose tissue
Provide most of the bulk of the breast
Four (five) quadrants of the breast
Upper inner quadrant
Lower inner quadrant
Upper outer quadrant
Lower outer quadrant
Axillary process
4 Axillary Lymph Nodes
Central Axillary
Pectoral
Subscapular (posterior)
Lateral
Supernumerary nipple
Extra nipple
Tanner Staging of puberty
Five stages of breast development
Thelarche
Signals the beginning of puberty at 8-10 years of age
Beginning of breast development
Menarche
Beginning of menstruation
About 2 years after breasts
Colostrum
Thick, yellow fluid appears after 4th month of pregnancy
Precedes milk production
Gynecomastia
Temporary enlargement of male breast tissue in male adolescence
Andrenarche/Pubarche
Second development of puberty
Axillary and Pubic Hair Development
GnRH
(Gonadotropin Releasing Hormone)
Stimulates lutenizing hormone and folicular stimulating hormone in the pituirary gland
Produce testosterone in testicles and estrogen in the ovaries
Considerations fo Pregnancy (5)
- Change in breast and nipple size and shape
- Blue vascular pattern becomes visible
- Stretch marks
- Darker, more erect nipples
- Expression of colostrum (4th month)
Age-related breast changes (5)
Decrease in ovarian secretion of estrogen and progesterone
- Glandular tissue atrophies, replaced with fibrous connective tissues
- Fat atrophies
- Reduced breast size and elasticity
- Masses/lumps may become palpable
- Lactiferous ducts more palpable (firm and stringy from fibrosis)
Age-related breast changes (5)
Decrease in ovarian secretion of estrogen and progesterone
- Glandular tissue atrophies, replaced with fibrous connective tissues
- Fat atrophies
- Reduced breast size, density and elasticity
- Masses/lumps may become palpable
- Lactiferous ducts more palpable (firm and stringy from fibrosis)