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15 Cards in this Set
- Front
- Back
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Endoderm |
is an embryonic layer, was the hypoblast layer, but after primitive streak turns into this inner layer |
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Ectoderm |
is an embryonic layer, was the epiblast, after primitive streak occurs it turns into this outer layer |
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Mesoderm |
it is the new embryonic cell layer, derived from formation of primitive streak |
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Induction |
action of one group of cells on another, leads to est. of developmental pathway in the responding tissue |
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Proliferation |
Controlled cellular growth, accumulation of byproducts |
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Differentiation |
Change in identical embryonic cells to become distinct structurally and functionally |
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Morphogenesis |
Development of specific tissue structure or differing form due to embryonic cell migration |
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Maturation |
attainment of adult function and size |
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Oropharyngeal membrane |
location of the future primitive mouth or stomodeum or the embryo, begins digestive tract |
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Neural Tube |
formed during the 4th week by neural folds that are undergoing fusion; it forms future spinal cord and neural tissue |
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Neural Crest Cells |
develop from neuroectoderm; these cells migrate from crests of neural folds. Future developmen of head and neck, connective tissue, catrilage and bone |
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Cleft Lip |
You can have either unilateral or bilateral cleft lip. More common and severe in males, more commonly unilateral and on left side. treated by oral and plastic surgery, speech and hearing therapy may be needed |
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Dental Lamina |
growth from oral epithelium, growing deeper into the ectomesenchyme, is this layer. Influenced by neural crest cells, occurs in initiation stage, then changes its shape through out each stage (bud, cap, bell) |
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Tooth Germ |
Forms during the cap stage, surrounds inside mass of dental papilla. The enamel organ, dental papilla, and dental sac are all considered under this. IT is the primordium of the tooth. |
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Enamel Organ |
a depression in the deepest part of each tooth bud or dental lamina. It was originally derived from ectoderm |
