Mammary glands & Development of ext. genitalia
Terms
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- Mammary glands
-
are modified sudoriferous glands that produce milk.
loe over the pectoralis major and serratus anterior muscle -
Mammary glands
(internal anatomy) -
Suspensory (coopers) ligaments
Lobules (compartments) - Suspensory (coopers) ligaments
-
strands of conn. tissue run btwn. the skin and deep fascia and support the breast
become looser with age and excessive strain. - Lobules (compartments)
-
Alveolar clusters of milk secreting cells
Secondary tubules
Mammary ducts
Lactiferous sinus
Lactiferous duct - Alveolar clusters of milk secreting cells
- embedded in conn. tissue
- Secondary tubules
- Milk flows to ________ ______ → mammary ducts
- Mammary ducts
-
near nipple
expand to form sinuses - Lactiferous sinus
- where milk can be stored before being drained into a Lactiferous duct
- Lactiferous duct
-
typically carries milk from one of the lobes to the exterior
closely spaced openings of ducts where milk emerges -
Mammary glands
(external anatomy) -
nipple
areola - nipple
- one pigmented projection of each breast
- areola
-
circular pigmented area of skin surrounding the nipple
appears rough because of modified sebacceous glands -
Mammary glands
(Function) -
Production, secretion, and ejection of milk
assoc. with pregnancy and birth - Lactation
- Secretion or formation of milk by the mammary glands
- Control of lactation
-
Prolactin (PRL)
Oxytocin (OT) - Prolactin (PRL)
- Es. stimulates milk production - also requires progesterone and estrogen
- Oxytocin (OT)
- Stimulates milk ejection
- Genital tubercle
- before differentiation, all embyros have an elevated midline swelling
- Penis
-
Clitoris
Homologous structures? - Scrotum
-
labia majora
Homologous structures? - Corpus spongiosum
-
Bulb of vestibule
Homologous structures? - Bulbourethral gland
-
bartholins gland
Homologous structures?