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28 Cards in this Set
- Front
- Back
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mammary glands are derived from?
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ectoderm
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more than two breasts
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polymastia
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extra nipples
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polythelia
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what kind of glands are the breasts?
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modified apocrine sweat glands
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development of enlarged breast in males
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gynecomastia (seen in klienfelters)
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how many glandular subunits does each breast contain roughly?
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15-20
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what are the fibrous bands of CT that radiate out from the nipple? what kind of CT
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suspensory ligaments of cooper, dense CT
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describe a lactiferous duct
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opens onto the nipple from each lobe, stratified cuboidal, stratified squamous at actual opening of skin, myoepithelial cells between rpithelium and basement membrane
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classify the breast gland
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compound tubuloalveolar
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produce elevations in the area of the nipple, between apocrine -sweat and mammary glands instructure
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glands of montgomery
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what kinds of glands does the areola contain?
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sweat and sebaceous
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dilated portion of each lactiferous duct in the nipple just beneath the areola
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lactiferous sinus
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lead to lobules, simple cuboidal to columnar, myoepithelial present
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terminal duct
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what causes the secretory part of the breast glands to proliferate?
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estrogen and progesterone during pregnancy
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describe intralobular vs interlobular CT
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inter - dense irregular, fibroelastic
intra - loose ct |
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inactive breast gland
describe: ducts, glandular component, alveoli, |
lots of ducts, little glandular component, little or no secretory alveoli
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Proliferating breast(pregnancy)
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branching of ducts, development of alveoli, lobules enlarge, see lymphocytes plasma cells and eosinophils
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what causes breast glands to proliferate?
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estrogen (pregnancy)
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Lactating gland
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decrease lymphoid elements in ct, lipids, reduction of intralobular CT,
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alkaline yellowish secretiob secreted immediatley after birth
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colostrum
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what does true milk have that colostrum doesn't
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higher in prot, vit a, sodium chloride, high levels of Ab, lower in carbs lipid and potassium
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milk production and secretion stimulated by?
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prolactin
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merocrine secretion of what milk products
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protein, the electron dense particles in alveolar lumen in EM
see RER, golgi and secretory vesicles |
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apocrine secretion of what milk products
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lipid,
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milk ejection reflex is stimulated by what two limbs
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afferent neural limb - suckling
efferent hormonal limb - prolactin/oxytocin |
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what does prolactin suppress to bring about lactational ammhenorea?
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LH
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where is prolactin released? oxytocin?
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prolactin - ant. pit
oxytocin - post. pit. |
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when does degeneration of alveoli begin?
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40 years
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