Breast Week - Anatomy

Question 1

What is the secretory tissue of the breast made of?

Answer 1

Lobes

Question 2

What do the lobes of the breast contain?

Answer 2

compound tubulo-acinar gland

Question 3

What does the compound tubuloacinar gland drain into?

Answer 3

Ducts which lead to the nipple

Question 4

What separates the breast tissue into lobules?

Answer 4

Fibrous tissue

Question 5

What are the suspensory ligaments of the breast?

Answer 5

Thick condensations of connective tissue extending from dermis to deep fascia over muscle

Question 6

What is the basic functional unit of the breast?

Answer 6

terminal duct lobular unit

Question 7

What does TDLU pass into in the non-lactating breast?

Answer 7

Intralobular collecting duct

Question 8

Where does the intralobular collecting duct drain into?

Answer 8

Lactiferous duct

Question 9

Where does the lactiferous duct lead to?

Answer 9

Nipple

Question 10

What separates the acini of the breast?

Answer 10

Loose connective tissue

Question 11

What are the secretory cells of the acinus surrounded by?

Answer 11

Myoepithelial cells

Question 12

Describe the epithelium of the nipple?

Answer 12

Keratinised stratified squamous epithelium

Question 13

Describe the core of the nipple

Answer 13

Irregular connective tissue mixed with smooth muscle bundles

Question 14

Describe the lining of the nipple near the surface

Answer 14

Stratified squamous

Question 15

Describe the changes that occur in the breast during the luteal phase of menstruation

Answer 15

Epithelial cells get taller
lumen of ducts is enlarged
Small secretions in ducts

Question 16

What changes occur in the breast during the first trimester?

Answer 16

Elongation and branching of smaller ducts
Cell proliferation (of epithelial cells of glands and myoepithelium cells)

Question 17

What changes occur in the breast during the second trimester?

Answer 17

Glandular tissue develops with differentiation

Plasma cells and lymphocytes infiltrate nearby tissue

Question 18

What changes occur during the breast during the third trimester?

Answer 18

Secretory alveoli continue to mature with development of extensive rER

Question 19

Describe the composition of human milk

Answer 19

Mostly water
1.5% protein
7% carbs
3.5% lipid
Ions, vits and IgA

Question 20

Describe apocrine secretion in the breast

Answer 20

Lipid droplets secreted surround by a membrane with a small amount of cytoplasm

Question 21

Describe mesocrine secretion in the breast

Answer 21

Proteins secreted in vesicles which merge with membrane and only release contents into duct system

Question 22

What is mesocrine secretion otherwise known as?

Answer 22

Exocytosis

Question 23

Where are the proteins in human milk made?

Answer 23

rER

Question 24

What changes occur in the breast following menopause?

Answer 24

Less collagen and elastic fibres

Secretory cells degenerate