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Flashcards in Embryology Deck (39)
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31

What is between the somatic mesoderm and splanchnic mesoderm?

Coelom

32

What serous cavities form from the coelom?

Peritoneal
Pericardial
Pleural

33

Major Derivatives of the Ectoderm

Epidermis, hair, nails, glands of skin
Brain & spinal cord
Neural crest: sensory nerve cells, nervous structures, pigment cells, portions of skeleton, blood vessels in H&N

34

Major Derivatives of the Endoderm

Epithelial lining and glands of digestive and respiratory tracts

35

Major Derivatives of the Mesoderm

Nucleus pulposus
Vertebrae & ribs
Dermatomes
Trunk & limb musculature
Kidneys
Gonads
Parietal serosa
Ventral body dermis
CT of limbs
Wall of digestive & respiratory tracts
Visceral serosa
Heart
Blood vessels

36

When does the heart start pumping?

4 weeks to 1 month

37

When Does Organogenesis Occur?

Weeks 3-8

38

What occurs during organogenesis?

Stem cell populations established for each organ
MOST gross structural birth defects are induced

39

What is the significance of organogenesis?

Mother MUST avoid environmental, dietary, and drug exposure during this period