Term
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Definition
- Protosomes--Blastopore becomes mouth, spiral cleavage
- Deuterosomes--Blastopore becomes anus, radial clevage
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Term
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Definition
| Open area in the blastopore |
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Term
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Definition
- Coelum
- Complete digestive tract
- Well developed systems
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Term
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Definition
- Movement does not interfer with digestion
- Coelomic fluid bathes cells
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Term
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Definition
- Must remain moist to prevent dessication
- Have an impermeable body covering
- Have an internal respiratpry system
- Have "shelled" embyros
- Return to water for reproduction
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