Mammary Gland Histo Flashcards
Intralobular duct CT
loose CT
allows gland to expand during pregnancy
Interlobular duct CT
dense CT
fills the spaces between the lobes
Epithelium in lobules
simple cuboidal
stratified squamous near opening of nipple
Nipple epithelium
keratinizing stratified squamous
Are there sweat glands and hair follicles in the nipple
no
Alveolar glands of Montgomery
intermediate between sweat gland and true mammary gland
oily secretions
sweat and sebaceous glands present
What happens to breasts in puberty
glands enlarged
increased stromal and adipose deposition
Myoepithelium responds to what
oxytocin
milk is pushed out, not sucked out
2 secretory processes of milk production
lipid (apocrine)
protein (meocrine/eccrine)
Inactive gland
- alveoli
- intralobular CT
- interlobular CT
flattened alveoli
prominent intralobular and interlobular CT
Pregnancy gland
- alveoli
- CT
- other cells present
alveoli increase in # and size
CT decreases
plasma cells infiltrate, produce IgA for infant
Active gland during lactation
-lumens
dilated lumens, contain milk
Resting gland during lactation
-lumens
after milk has been released
smaller lumens
Foremilk vs hindmilk
foremilk: protein (bright white)
hindmilk: lipids (pale white)
What occurs during weaning/involuation
secretory products released
decreased alveolar size
alveolar degeneration
CT increases
