Where does breast tissue normally develop?
ANSWER
Along the breast line
- located from under the arms down to the groin
What are the 3 stages of early breast development?
ANSWER
1. In utero
2. First 2 months of life
3. Puberty
Breast development during menstruation
ANSWER
- Estrogen: Induces Ductal System development
- Progesterone: Induces Lobular-Alveolar development
What is Lactogenesis?
ANSWER
The initiation of milk production
How many stages of Lactogensis are there?
ANSWER
4
1
,What stages of Lactogenesis occur during pregnancy?
ANSWER
1 and 2
Lactogenesis 1
ANSWER
Ductal and Lobular-Alveolar systems grow at an accelerated rate (influenced by hormones)
- breasts enlarge
- high progesterone levels cause an increase in alveoli
- colostrum begins to produce in the alveoli
When does Lactogenesis 1 occur?
ANSWER
around 16 weeks
Lactogenesis 2
ANSWER
The placenta is released from the uterus and progesterone levels drop
- this causes the alveolar cells to begin to release milk and allows them to continue to pro-
duce more milk
How long does Lactogenesis 2 last?
ANSWER
2-4 days
What are the 5 main areas of the breast?
2
, ANSWER
- Upper Inner
- Lower Inner
- Upper Outer
- Lower Outer
- Tail of Spence
What are the 2 types of breast tissue and what are they composed of?
ANSWER
- Parenchyma: ductal and lobular-alveolar structures
- Strom: connective tissue (fat, vascular, nerve, lymphatic)
What is an Alveolus
ANSWER
Small cavity where milk is produced and stored
- made of epithelial cells
What are Alveoli?
ANSWER
multiple alveolus
What is the Intra-lobular duct?
ANSWER
Connects a lobule to the lactiferous ducts
What is a Mammary Lobule?
ANSWER
3
ANSWER
Along the breast line
- located from under the arms down to the groin
What are the 3 stages of early breast development?
ANSWER
1. In utero
2. First 2 months of life
3. Puberty
Breast development during menstruation
ANSWER
- Estrogen: Induces Ductal System development
- Progesterone: Induces Lobular-Alveolar development
What is Lactogenesis?
ANSWER
The initiation of milk production
How many stages of Lactogensis are there?
ANSWER
4
1
,What stages of Lactogenesis occur during pregnancy?
ANSWER
1 and 2
Lactogenesis 1
ANSWER
Ductal and Lobular-Alveolar systems grow at an accelerated rate (influenced by hormones)
- breasts enlarge
- high progesterone levels cause an increase in alveoli
- colostrum begins to produce in the alveoli
When does Lactogenesis 1 occur?
ANSWER
around 16 weeks
Lactogenesis 2
ANSWER
The placenta is released from the uterus and progesterone levels drop
- this causes the alveolar cells to begin to release milk and allows them to continue to pro-
duce more milk
How long does Lactogenesis 2 last?
ANSWER
2-4 days
What are the 5 main areas of the breast?
2
, ANSWER
- Upper Inner
- Lower Inner
- Upper Outer
- Lower Outer
- Tail of Spence
What are the 2 types of breast tissue and what are they composed of?
ANSWER
- Parenchyma: ductal and lobular-alveolar structures
- Strom: connective tissue (fat, vascular, nerve, lymphatic)
What is an Alveolus
ANSWER
Small cavity where milk is produced and stored
- made of epithelial cells
What are Alveoli?
ANSWER
multiple alveolus
What is the Intra-lobular duct?
ANSWER
Connects a lobule to the lactiferous ducts
What is a Mammary Lobule?
ANSWER
3
