28 wks
• Gut,
villi and crypts,
peristalsis
•
Surfactant in lungs
Alveolar walls thinning
•
Pituitary coordination of
endocrine function
•
Hematopoiesis liver,
spleen, bone marrow
• Some
myelination brain
• Response
to sound
•
Subcutaneous fat
• Skin
keratinized, lanugo
hair