Breast Anatomy and Histology Flashcards
the breast is a ___ gland
subcutaneous
what duct drains via a series of ducts eventually leading to the nipple?
tubuloacinar
what structure is located adjacent to the secretory lobules of the breast?
dense fibrocollagenous connective tissue
what surrounds the fibrous tissue of the breast?
adipose tissue
what is contained within each lobe of the secretory tissue of the breast?
tubuloacinar glands
suspensory ligaments are contained within what layer?
fibrous connective tissue
suspensory ligaments are most abundant in what area of the breast?
upper breast
what do suspensory ligaments anchor to superficially?
dermis of the skin
what is the basic functional secretory unit of the breast?
terminal duct lobular unit
the ___ duct leads to the nipple
lactiferous
name the expanded duct that the lactiferous duct passes through to get to the nipple
lactiferous sinus
name the 2 ducts of a breast lobule
extralobular
intralobular
what kinds of secretory epithelial cells exist within the lobule of the breast?
cuboidal to columnar
the secretory cells of the acinus (tubuloacinar gland) are surrounded by ___ cells
myoepithelial cells
what epithelium forms the surface of the nipple?
keratinised stratified squamous epithelium
becomes cuboidal deeper
what layers form the core of the nipple?
irregular connective tissue AND smooth muscle
name the glands in the breast that are both milk and sweat producing glands?
montgomery’s glands
elongation and branching of smaller ducts occurs in what trimester of pregnancy?
1st
plasma cells and lymphocytes infiltrate nearby connective tissue in what trimester of pregnancy?
2nd
major circulating antibody
IgG
main secretory antibody
IgA
there is development of what organelles in the 3rd trimester of pregnancy?
rough ER
proliferation of epithelial and myoepithelial cells occur in what trimester of pregnancy?
1st
oestrogen and progesterone increase proliferation of the ___ tissue of the breast only
secretory
main carb in breast milk?
lactose
what cells secrete IgA?
plasma cells
the fat element of breast milk is released via ___ secretion
apocrine
the protein element of breast milk is released via ____ secretion
merocrine (exocytosis)
what elements of the mammary gland degenerate in menopause?
secretory cells of TDLUs (terminal duct lobular unit)
