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Flashcards in Lesson 3A (Part 1) Deck (30)
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1

What do breast lie over?

The pectoral muscles

2

How are breasts attached to the pectoral muscles?

By a layer of connective tissue
- fascia

3

What makes up breasts? (4)

1. Milk-producing mammary glands
2. Extensive supporting tissues
3. Adipose tissue
4. Coopers suspensory ligaments

4

Coopers suspensory ligaments

Ligaments that help support the glandular and connective tissues of the entire structure, anchoring them to the coverings of the underlying pectoral muscles

5

What does each breast consist of?

Several lobes separated by septa (walls) of connective tissue

6

What does each lobe consist of?

Lobules

7

What do lobules contain?

Connective tissues in which are embedded in the pouches of milk-secreting cells

8

What is another word for the pouches of milk-secreting cells?

Alveoli

9

How are the alveoli arranged?

Into grape-like clusters around the tiny ductule

10

Where do you find myoepithelial cells?

Present around the outside of the alveolus

11

What do myoepithelial cells do?

Contracts slightly, as if it were a muscle cell, thus squeezing milk out into the secretory duct

12

What do the ductules from the various lobules unite to form?

Single lactiferous duct for each lobe

13

How many single lactiferous duct are there for each lobe?

15-20 in each breast

14

TDLU

Terminal ductolobular unit

15

What is the number one area where cancer forms?

Terminal ductolobular unit

16

What does the terminal ductolobular unit contain? (2)

1. Lobule
2. Ductal

17

How is the lactiferous sinuses positioned?

To be squeezed by the suckling motion of a baby's jaws during breastfeeding

18

What do sinuses act as?

Little pumping chambers that help move milk out of the breast

19

What does each of the main ducts do?

Terminates in a tiny opening on the surface of the nipple

20

What is the function of the lactiferous sinuses?

When an infant is properly latched on to the breast, its jaws squeeze the lactiferous sinuses rhythmically, thus pumping milk out of the breast and into the back of the infant's mouth

21

What are nipples bordered by?

Areola

22

Areola

Circular pigmented area

23

What does the areola contain?

Numerous sebaceous glands
- small nodules under the skin

24

What is another name for numerous sebaceous glands?

Montgomery's tubercles

25

What do the areolar glands produce?

Sebum

26

What does sebum do?

Helps to reduce irritating dryness of the areolar skin associated with nursing
- helps with moisturizing

27

What do areolar secretions contain (other than sebum)?

Pheromones

28

What do pheromones do?

Enhance the mother/infant social bond

29

What is the function of the mammary glands?

Lactation

30

Lactation

The secretion of milk for the nourishment of a newborn infants