Q.
Milk secreted from the cells of the alveoli of mammary
lobes reach nipple through lactiferous duct (L), mammary
duct (M), mammary tubule (T) and mammary ampulla (A)
in the following order:
Mammary glands or breasts are modified sweat glands
that lie over the pectoral muscles. Each breast has a broad
multiporous tip called nipple for the release of milk. A
circular pigmented area called areola lies below it. Each
breast conatains 15-20 glandular lobes separated from one
another by dense connective tissue and adipose tissue. Each lobe is further made of a number of lobules having
glandular or secretory alveoli. The cells of alveoli produce
milk which is stored in the cavities or lumens of alveoli.
Alveoli open into mammary tubules and them into
mammary ducts. Mammary ducts form a mammary ampulla
from which a lactiferous duct develops. Each lobe produces
a separate lactiferous duct. The various lactiferous ducts
open at the nipple by separate pores.