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Embryology 2 (Mesoderm
Skeleton
Most voluntary muscles
Most dermis
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Embryology 2
Mesoderm
- Skeleton
- Most voluntary muscles
- Most dermis
- Circ system
- Lining all major cavities
- UG system
INTERMEDIATE MESODERM
- Urogenital system
- Gonads, ducts + accessory glands
PARAXIAL MESODERM
- Muscles of head
- Striated skeletal muscle (trunk,limbs)
- Skeleton (except cranium)
- Dermis of skin
- Connective tissue
LATERAL MESODERM
- Connective tissue + muscle of viscera
- Serous membranes of pleura, pericardium and peritoneum
- Primordial heart
- Blood and lymphatic cells
- Spleen
- Suprarenal cortex
HEAD
- Cranium
- Connective tissue of head
- Dentin
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Somite differentiation
- Each somite forms its own
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Dev CVS system
Blood cells dec from specialised endothelial cell: hemangioblasts at end 3rd week. Heamatogenesis begin 5th week
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- Mesenchymal cells diff into endothelial cell precursors angioblasts : aggregate into blood islands
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Folding embryo
- Folding flat tri-laminar embryo into cylindric embryo beginning 4th week
- Folding and resulting formation of ab wall (ectoderm) lead enclosure of mesoderm and endoderm become surrounded by ectoderm later forms skin
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