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10 Cards in this Set
- Front
- Back
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Define gastrulation |
A process of cell division and migration resulting in the formation of the three germ layers |
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What are the three regions of the mesoderm (draw)? |
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Where is the paraxial mesoderm located? What is its function? |
adjacent to notochord and neural tube forms somites |
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What is formed from the intermediate mesoderm |
genitourinary system |
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What are the two layers of the lateral plate mesoderm |
1.Somatic or parietal layer 2.Splanchnic or visceral layer |
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Where do the following types of muscle originate from; skeletal smooth cardiac |
skeletal: paraxial mesoderm smooth: splanchnic mesoderm - EXCEPT: PUPIL, MAMMARY AND SWEAT GLANDS cardiac: splanchnic mesoderm |
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Where are somites formed? When does this begin? How many pairs by end of 5th week? |
- paraxial mesoderm - day 20 - 42-44 |
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What happens after the somites have formed? |
- they begin to differentiate - ventral and medial area become the sclerotome which forms the vertebrae and limbs - dorsal half becomes the dermomyotome. forming the dermis of the back and muscles |
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List two transcription factors involved in embryonic muscle development and what they do |
- MyoD and MYF5 - Enable the differentiation of myogenic precursor cells in the dermomyotomeinto myoblasts - can convery non-muscle cells into muscle cells |
