Mammary gland structure

Question 1

Describe the basic structure of a mammary gland

Answer 1

15-25 secretory lobes draining via ducts to the nipple; surrounded by dense fibrous tissue and adipose tissue

Question 2

Epithelium of ducts/secretory acini

Answer 2

Ducts- columnarAcini- cuboidal

Question 3

Expanded area of duct near the nipple

Answer 3

Lactiferous sinus

Question 4

Summarise the structure of the nipple

Answer 4

Core of connective tissue and smooth muscle, covered by pigmented keratinized stratified squamous epithelium

Question 5

Changes in the luteal phase of menstrual cycle

Answer 5

Ducts become enlarged, small amounts of secretion

Question 6

Summarise the changes seen in pregnancy

Answer 6

Elongation and branching of ducts; epithelial proliferation; maturation of secretory alveoli; less connective tissue and adipose tissue

Question 7

Composition of human milk

Answer 7

88% water7% carbohydrate3.5% lipid1.5% protein+ ions, vitamins, IgA