Reproductive System Anatomy

Question 1

define polymastia, polythelia, amastia, and athelia

Answer 1

polymastia: extra breast
polythelia: extra nipple
amastia: absent breast
athelia: absent nipple

Question 2

what are the 3 blood supplies of the breast?

Answer 2

1. thoracoacormial/superior thoracic aa - branch of first part of axillary aa
2. lateral thoracic aa - branch of second part of axillary aa
3. internal mammary/internal thoracic aa - branch of subclavian aa

Question 3

what are the 3 lymphatic drainages of the breast?

Answer 3

1. axillary nodes (75%)
2. supra/infraclavicular nodes
3. internal thoracic nodes

Question 4

what are the excretory and secretory parts of the glandular tissue of the breast?

Answer 4

secretory - acini (terminal duct lobular unit)

excretory - duct system

Question 5

what type of connective tissue is in the stroma?

Answer 5

interlobular tissue is fibrocollagenous and dense, while intralobular tissue is more loose.
fibroadipose tissue surrounding the outside of the lobules

Question 6

what type of epithelium lines the duct system and acini of the breast? (hint: bilayer)

Answer 6

low columnar or cuboidal epithelium

1. luminal epithlium
2. myoepithelium

Question 7

how do you differentiate between acini and adipose cells (both are white) in histology?

Answer 7

acini is surrounded with epithelium while fat cells are not.

Question 8

what is the anatomical location of the breast?

Answer 8

2/3rd - 6th ribs
sternal edge to mid-axillary line
lies over 3 muscles: pec major, pec minor, serratus anterior

Question 9

what are the 4 quadrants of the breast?

Answer 9

inferior/superior lateral/medial

- axillary tail of spence is an extension into the axillary fossa from the superior lateral quadrant