Breast anatomy/physiology

Question 1

What does a breast lobe consist of?

Answer 1

A compound tubulo-acinar gland which drains through a series of ducts leading to the nupple

Question 2

How does fluid drain in the breast?

Answer 2

Terminal ductules > intralobullar collecting duct > lactiferous duct > lactiferous sinus > nipple

Question 3

What is the nipple coveredby?

Answer 3

Highly pimented squamous epithelium

Question 4

What is the core of the nipple made of?

Answer 4

Dense irregular connective tissue mixed with bundles of smooth uscle

Question 5

Which glands are present in abundance on the nipple?

Answer 5

Sebaceous glands

Question 6

What changes happen to the breast in the luteal phase of menstruation?

Answer 6

Epithelial cells increase in height

Lamina of ducts becomes enlarged & small amount of secretions

Question 7

What happens to the breasts in the first trimester of pregnancy?

Answer 7

Eongation & branching of small ducts & proliferation of epithelial cells

Question 8

What happens to the breasts in the second trimester of pregnancy?

Answer 8

Differentiation of seretory alveoli, plasma cells & lymphocytes infiltrate connective tissue

Question 9

What happens to breasts in the third trimester of pregnancy?

Answer 9

Secretory alveoli continue to mature, development of extensive rER
Reduced amount of connective & adipose tissue

Question 10

What causes reduced amount of connective & adipose tissue in the third trimester of pregnancy?

Answer 10

Oestrogen & progesterone

Question 11

What is breast milk composed?

Answer 11

88% water
1,5% protein
7% carb
3.5% lipid