Term
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Definition
| process that transforms the Blastula into a three-layered structure - completed by the end of the 2nd week after fertilization |
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Term
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Definition
| embryo in process of gastrulation |
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Term
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Definition
| primitive gut is the only one opening to the outside (becomes either the mouth or anus depending on the group of animals) |
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Term
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Definition
| pushing in of cells from one end of the Blastula |
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Term
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Definition
| rolling of cells at the blastopore |
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Term
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Definition
| cells leave an outer layer of cells transforming into freely migrating mesenchyme cells |
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Term
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Definition
| expansion of one cell sheet over the other |
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Term
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Definition
| row of cells moving between one another, creating an array of cells that is longer but thinner |
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Term
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Definition
| rows of cells intercalate |
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Term
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Definition
-forms nails, fingernails, teeth, cutaneus glands
-lens of the eye
-nervous system & external sensory receptors: sight, smell, taste, hearing and balance
-lining of the mouth, epithelia of nasal cavity, anal canal, enamel |
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Term
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Definition
-lining of digestive tract from the pharnyx to the anus
-lining of respiratory passages and lungs
-organs such as: stomach, intestines, liver, pancreas and the parathyroid and thyroid gland
-lining of the lower 1/5 of the vagina and lining of the urthera |
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Term
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Definition
-lining of body cavities
-muscles
-cartilage, bone and blood
-heart, blood vessels
-kidneys
-gonads
-adrenal cortex |
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