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12 Cards in this Set
- Front
- Back
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What does Cleavage Accomplish |
- Multicellularity - Regionalization - New cell-cell interactions (induction) - Cell movement (after divisions slow) - Partitioning of localized determinants |
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Regionalization |
Different areas of the embryo can become different |
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Cleavage Patterns: Yolk |
- Isolecithal=uniform, not a lot - Mesolecithal=moderate, often more on one end (e.g. frogs) - Telolecithal=lots, at one end (e.g. birds, reptiles) - Centrolecithal=middle (e.g. insects) |
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Cleavage Patterns: Completeness |
- Holoblastic=complete - Meroblastic=incomplete |
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Cleavage Patterns: Orientation |
- Radial - Rotational - Spiral - Bilateral - Discoidal - Superficial |
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Cleavage Patterns: Picture 1 |
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Cleavage Patterns: Picture 2 |
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Blastocoel |
a fluid-filled space with different ionicbalance from the embryo’s surroundings |
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Blastomere |
another word for an early embryonic cell |
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Mircomeres |
small blastomeres |
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Macromeres |
largeblastomeres |
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Mesomeres |
intermediate in size |
