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Germ Layers

Germ Layer Formation and Morphogenic Processes

QuestionAnswer
What are Germ Layers? Germ layers are a set of cells and tissues that form the primary cell layers during embryonic development
What are the three germ layers? Ectoderm, Mesoderm, Endoderm
What structures are a part of the Ectoderm? -Skin -Nervous system (brain and spinal column)
What structures are a part of the Mesoderm? -Bones -Muscles -Kidney -Connective tissue -Sex organs -Cartlidge
What structures are a part of the Endoderm? -Digestive system -Respiratory system
Which is the last germ layer to develop? Endoderm
Which is the first germ layer to develop? Ectoderm
True or False: All three of the germ layers can form epithelial cells? TRUE
What are Transient Structures? Transient structures form layers but eventually dissolve when it's no longer needed (Example: Notochord)
What two cell types are involved in the morphogenic process? 1. Epithelial cells 2. Mesenchymal cells
Define Delamination Epithelium becomes mesenchyme
Define Condensation Transition of cells from a mesenchyme to an epithelium
Define Morphogenesis Changing of shape and position of cells
Define Differentiation What genes are being expressed and what proteins are being made in the cell [Cell Function]
True or False: Cells can go from epithelial to mesenchymal back to epithelial during the process of morphogenesis TRUE
Created by: IsabellaHixson
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