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chordata
N/A
4
Biology
7th Grade
04/24/2012

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Term
WHat are the 4 characteristics of all chordata?
Definition
1. dorsal tubular nerve cord- became spinal cord
2. notochord- became spinal column
3. pharangeal pouches- became gills
4. tail
Term
describe the endoskeleton
Definition
made of living cells and grows with the organism
Term
what is an ectotherm?
Definition
an organism that changes its body temp based on the temp of the external environment (cold-blooded)
Term
what is an endotherm?
Definition
organism that generates its own body heat internally by its own metabolism
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