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31 Cards in this Set
- Front
- Back
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motile |
organisms that can move from place to place |
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sessile |
organisms that are permanently attached to an area |
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one major division in the phylogenetic tree |
the division between vertebrates and invertebrates |
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a backbone |
protects an animals main nerve cord |
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assymetrical |
having no particular body arrangement ex: sponge |
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radial symm |
all body parts radiate from one central area (like pie pieces) ex: star fish |
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radial symm |
all body parts radiate from one central area (like pie pieces) ex: star fish |
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bilateral symmetry |
body parts arrange in two sides which are usually mirror images of one another ex: humans |
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radial symm |
all body parts radiate from one central area (like pie pieces) ex: star fish |
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bilateral symmetry |
body parts arrange in two sides which are usually mirror images of one another ex: humans |
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dorsal |
top surface of radial symmetric organism |
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radial symm |
all body parts radiate from one central area (like pie pieces) ex: star fish |
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bilateral symmetry |
body parts arrange in two sides which are usually mirror images of one another ex: humans |
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dorsal |
top surface of radial symmetric organism |
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ventral |
bottom surface of radial symmetric organism |
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anterior |
front end of bilaterally symmetric animal |
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anterior |
front end of bilaterally symmetric animal |
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posterior |
rear end of bilaterally symmetric animal |
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anterior |
front end of bilaterally symmetric animal |
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posterior |
rear end of bilaterally symmetric animal |
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medial |
the plane the divided a bilateral animal into mirror images |
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anterior |
front end of bilaterally symmetric animal |
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posterior |
rear end of bilaterally symmetric animal |
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medial |
the plane the divided a bilateral animal into mirror images |
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segmentation |
repeating units or segments of an organism (like an earthworm) |
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anterior |
front end of bilaterally symmetric animal |
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posterior |
rear end of bilaterally symmetric animal |
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medial |
the plane the divided a bilateral animal into mirror images |
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segmentation |
repeating units or segments of an organism (like an earthworm) |
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some organisms that seem to have nothing in common are |
classified in the same groups because of their tissue development |
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tissue development |
the process by which cells differentiate into different tissues starting at the point of fertilization |
