Term
| The three germ cell layers that form in the third week of development are made from which type of cells? |
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Definition
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Term
| What tissues are derived from Ectoderm? |
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Definition
| Epithelium and Nerve tissue |
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Term
| What tissues are derived from Mesoderm? |
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Definition
| Epithelium, Muscle, and Connective Tissue |
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Term
| What tissues are derived from Endoderm? |
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Definition
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Term
| Endoderm forms the epithelial lining of: |
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Definition
| GI tract, organs from bud of the endoderm tube, Respiratory system, liver, pancreas, terminal part of the urogenital system, and pharyngeal derivatives (thymus, thyroid, parathyroid, palantine tonsils) |
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Term
| Mesoderm forms the epithelial lining of? |
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Definition
| Body cavities, cardiovascular system, reproductive system, urinary system |
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Term
| What defines the cranial-caudal and right-left halves of the embryo? |
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Definition
| appearance of a primitive streak |
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Term
| The precordal plate marks the site of what development? |
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Definition
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Term
| What forms at the cloacle plate? |
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Definition
| Anus, genital, and urinary tracks. Open by week 7 |
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Term
| What forms at the oropharyngeal membrane? |
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Definition
| Oral cavity. Opens by Week 4 |
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Term
| If the primative streak does not disappear, what could happen? |
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Definition
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Term
| What is the primitive node? What is it's function? |
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Definition
| The primitive node is a collection of cells at the cranial end of the primitive streak. These cells will eventually go through the primitive pit and form the Notocord |
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Term
| What is the primitive pit? |
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Definition
| An opening that gets filled with cells, making the Notocord |
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Term
| What is the primitive groove? |
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Definition
| A groove that appears on the surface of the primitive streak. Cells migrate to this groove and form the germ layers |
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Term
| How do cells become loose enough to travel through the primitive groove? |
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Definition
| Cell adhesion molecules disassociate to allow passage. Mesoderm remains loose |
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Term
| What does paraxial mesoderm give rise too? |
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Definition
| Dermatome, Myotome, and Sclerotome |
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Term
| What does the scleratome give rise? |
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Definition
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Term
| What does the Dermatome give rise to? |
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Definition
| Sensory components of the epithelium |
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Term
| What does the Myotome give rise too? |
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Definition
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Term
| Somites come from what cell tissue? |
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Definition
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Term
| Generally speaking, what do the somites develope into? |
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Definition
| axial skeleton and associated muscles |
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Term
| The lateral plate mesoderm folds down to create which two layers (on either side of the Body coelem) |
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Definition
| Visceral (Splachnic) is the inside layer and Somatic (Parietal) is the outside layer of the lateral plate mesoderm |
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Term
| What are the 3 layers that form from the mesoderm? |
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Definition
Inside to out:
Paraxial Mesoderm, Intermediate Mesoderm, and Lateral Plate Mesoderm |
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