Term
| 2 Layers of Skin -- & dvlpd from what |
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Definition
Epidermis - from ectodermal cells
Dermis - from mesoderm (somites) |
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Term
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Definition
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Term
| 3 different Embryonic Periods |
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Definition
1- Proliferative Period (0-2 wks) -large increase in # of cells
2-Embryonic (2-8 wks) cells dvlp into structures & places -form organs
3. Fetal Period (8wks-9 mnths) furthr dvlpmnt of organs & maturation -functional capabilities |
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Term
| Neural Crest Cells help form...? |
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Definition
| Nervous System in head & neck region AND tissues of face |
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Term
| Differentiations of Somites |
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Definition
| Sclerotome, dermatome, and myotome |
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Term
| Somites contribute to...? |
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Definition
| Dermis & all muscles functioning in peristalsis & outer layer of digestive system |
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Term
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Definition
Developmental areas in mesoderm
-become functional and go to certain areas |
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Term
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Definition
Differentiates into mesenchymal cells (aka stem cells)
can become: fibroblasts, osteoblasts, chondroblasts
(migrate throughout body) |
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Term
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Definition
(somite)
Forms dermis, subcutaneous tissue & visceral mesoderm |
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Term
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Definition
Elastin-ears and nose
Hyaline-btwn joints
Fibrous-intervertebral discs |
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Term
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Definition
1-Appositional (growth on surface or edge of cartilage)
2- Interstital (growth btwn chondrocytes) |
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Term
| 2 different bone development ways |
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Definition
1-Endochondrial Bone Dvlpmnt
(bone replaces cartilage) -after cartilage formed osteoblasts lays bone
2-Intramembranous Bone Formation
(directly from connective tissue)
Collagen (CT) mks meshwork wch calcifies into bone *Bones of facial and neurocranium |
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Term
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Definition
(during endochondrial bone dvlpmnt)
Cartilaginous discs btwn bone in head and body of long bones |
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Term
| Myoblasts differentiate into... |
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Definition
| (muscle cell) different types of muscle: SMOOTH (digestive tract), CARDIAC, SKELETAL |
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Term
| Vascular System embryo uses in 1st few weeks |
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Definition
| Vitelline Vascular System |
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Term
| Vitelline Vascular System |
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Definition
embryo lives off this for 1st few weeks
--nutrition moves from yolk sac to embryo |
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Term
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Definition
By 4th week connects to mother
-Nutrition & Oxygen taken to embryo AND -CO2 & Wastes taken to placenta |
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Term
| The opening between Right & Left Atria that closes at birth |
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Definition
Foramen Ovale
--there since lungs aren't big enough to breath on own |
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Term
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Definition
| Pit dvlps between brain and heart --> oral cavity |
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Term
| Deepest extent of oral cavity -->Membrane that seals it to allow cells to develop |
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Definition
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