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