breast anatomy Flashcards
how many lobules are there in each breast
15-25
what does tubulo-ancinar mean in relation to the breast lobules
tubulo- refers to the tubular portion of the terminal duct system
acing refers to the bunch of grapes structure of the gland
what types of tissue are the secretory lobules surrounded by
dense fibrous tissue
adipose tissue
what are suspensory ligaments
larger condensations of fibrous connective tissue that extend from the dermis of the skin to the deep fascia of the muscle overlying the anterior chest wall
where are the suspensory ligaments most pronounced
upper breast
how are the suspensory ligaments of clinical important
responsible for the puckered appearance of the breast surface if there is a mass growing in the breast
‘piel de orange’
what is the basic functional secretory unit of the breast
terminal duct lobular unit
describe the series of ducts present in the non-lactating breast, starting at the terminal ductule
terminal ductule drains into an intralobular collecting duct which leads into the lactiferous duct of that lobe which leads to the nipple
what is the lactiferous sinus
an expanded region of the lactiferous duct near the nipple
what type of epithelium lines the larger ducts
thin stratified squamous at the nipple
transitions to
stratified cuboidal further in
will then become thinner, maybe one cell thick
what is the purpose of myoepithalial cells in the duct system
contract to express milk
describe the difference in the tissue surrounding the lobules and acini
lobules: bands of dense fibrocollagenous connective tissue
acini: looser connective tissue to allow for rapid expansion during pregnancy
what type of cells surround the acini
myoepithelial
what type of epithelium covers the nipple
thin, highly pigmented, keratinised stratified squamous epithelium
the nipple is made up of what type of tissue
dense irregular connective tissue mixed with bundles of smooth muscle
