Lectures 26 & 27: Embryology, Pregnancy And Childbirth Flashcards Preview

CHI 280: Human Anatomy I > Lectures 26 & 27: Embryology, Pregnancy And Childbirth > Flashcards

Flashcards in Lectures 26 & 27: Embryology, Pregnancy And Childbirth Deck (33)
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30

Postnatal involution of the uterus

The period when the mother’s body reverts to the typical non-pregnant state, morphologically and physiologically.
It has no sharp end but is conventionally regarded as lasting 6 weeks.
Involution of the uterus is rapid over first few days postpartum then tapers off until effectively back to quiescent state by 6 weeks; - pink immediately post delivery; blue at 5 days postpartum; black at 12 days postpartum.

31

Lactation

True milk 2-3 days to come in.
• “Let-down” Reflex: oxytocin binds to myoepithelial cells surrounding alveoli ➡ milk ejected form alveoli into ducts from both breasts

32

What arises from each layers?
Ectoderm
Mesoderm
Endoderm

Ectoderm➡ epidermis and nervous system
Mesoderm➡ smooth muscle, connective tissue, blood vessels, skeleton, skeletal muscle, reproductive and excretory organs
Endoderm➡ epithelial linings of respiratory passages and digestive tract.