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What is the mode of secretion in the breast?
What is the mode of secretion in the breast?
What is the function of Montgomery glands in the areola?
What is the function of Montgomery glands in the areola?
What is the purpose of the suspensory ligaments of Cooper?
What is the purpose of the suspensory ligaments of Cooper?
What is the approximate number of lobes in the adult non-pregnant female breast?
What is the approximate number of lobes in the adult non-pregnant female breast?
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What is the change in the areola during pregnancy?
What is the change in the areola during pregnancy?
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What type of tissue is found in adipose CT?
What type of tissue is found in adipose CT?
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What type of cells are present in the connective tissue surrounding the alveoli?
What type of cells are present in the connective tissue surrounding the alveoli?
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At what stage of pregnancy do alveoli begin to appear?
At what stage of pregnancy do alveoli begin to appear?
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What is the function of the IgA secreted by the epithelial cells?
What is the function of the IgA secreted by the epithelial cells?
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What is the characteristic of the epithelial lining deep in the breast tissue?
What is the characteristic of the epithelial lining deep in the breast tissue?
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Flashcards
What is the mode of secretion in the breast?
What is the mode of secretion in the breast?
The process of milk secretion by the breast glands, involving the release of milk droplets from the apical portion of the secretory cells.
What is the function of Montgomery glands in the areola?
What is the function of Montgomery glands in the areola?
Montgomery glands produce a lubricating oil that keeps the areola and nipple moist, preventing cracking and infection during breastfeeding.
What is the purpose of the suspensory ligaments of Cooper?
What is the purpose of the suspensory ligaments of Cooper?
These ligaments are made of fibrous tissue and connect the breast tissue to the chest wall, providing support and maintaining the shape of the breast.
What is the approximate number of lobes in the adult non-pregnant female breast?
What is the approximate number of lobes in the adult non-pregnant female breast?
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What change occurs in the areola during pregnancy?
What change occurs in the areola during pregnancy?
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What type of tissue is found in adipose CT?
What type of tissue is found in adipose CT?
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What type of cells are present in the connective tissue surrounding the alveoli?
What type of cells are present in the connective tissue surrounding the alveoli?
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At what stage of pregnancy do alveoli begin to appear?
At what stage of pregnancy do alveoli begin to appear?
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What is the function of the IgA secreted by the epithelial cells?
What is the function of the IgA secreted by the epithelial cells?
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What is the characteristic of the epithelial lining deep in the breast tissue?
What is the characteristic of the epithelial lining deep in the breast tissue?
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Study Notes
Breast Structure
- The breast is a compound alveolar gland with an apocrine mode of secretion, where the apical part of the cells is lost during secretion.
Resting Mammary Gland (Adult Non-Pregnant Female)
- Covered with thin skin and has a central pink area of skin called the areola.
- The areola contains Montgomery glands that secrete oil to moisten the areola and nipple.
- The nipple is the site of main mammary gland duct opening.
Mammary Gland at Pregnancy
- The areola becomes permanently pigmented.
- Montgomery's glands enlarge, forming Montgomery tubercles.
- The nipples become more prominent.
Stroma
- Inter-lobar septa divide the breast into 15-20 lobes.
- The dense connective tissue forms suspensory ligaments of Cooper, extending from the dermis of the skin to the fascia over the pectoralis muscle to support and maintain the shape of the breast.
- Inter-lobular septa divide the lobes into lobules.
- Adipose connective tissue is loose and has CT cells and macrophages.
Parenchyma
- Proliferation of the parenchyma occurs at the expense of the stroma during pregnancy and lactation.
- Secretory units are rudimentary and only contain duct systems with no secretory units.
- Alveoli begin to appear at 6 months and are lined with columnar or cubical cells, surrounded by myoepithelial cells.
- Components of the duct system include intralobular ducts, extralobular ducts, interlobular ducts, lactiferous ducts, lactiferous sinus, and collecting ducts.
Epithelial Lining
- The epithelial lining is bilayered, with inner cubical to columnar cells and outer myoepithelial cells.
- The CT surrounding the alveoli contains many lymphocytes and plasma cells responsible for the secretion of IgA, which confers passive immunity on the newborn.
Milk Secretion
- Milk secretion appears vacuolated due to dissolved fat droplets.
- Colostrum appears in the alveoli, which is rich in protein.
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Description
This quiz covers the structure and function of the breast, including the modes of secretion and the changes that occur during pregnancy and lactation.
