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17 Cards in this Set
- Front
- Back
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what lacks body symetry
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sponges
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cnidaris and echinodems have what kind of symetry
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radial
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body parts extend from the center of the body like worms, and mollusks and arthropods have what kind of symmetry
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billteral
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concertration of sense organs and nerve cells in front of the body
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cephalization
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digustion of food inside the cells
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intracellular digestion
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digustion of food outside the cell
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extracellular digestion
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large surface areas that are in contact with the air or water. also for diffusion to occur the respiratory surfaces must be mosist
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respirator organs
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most comples aniimals move bllod though thir bodies using one or more hearts and either what kinds circulatory
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open and close
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open circulatory system
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blood is only partially contained within a system of blood vessels, mollusk and most anthropods are examples
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close circulatory system
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bood moves through the vessels and the rest of body
examples are annelids and some mollucks |
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most animals have an _ that rids the body of metabolic wastes while contrilling the amound of water in the tissues
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execretory system
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invertebrates show three trends of evolutions of the nervious system
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centralization, cephalization, and specialization
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invertebrakes have one of three main kinds of skeletal systems
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Hydrostatic skeletons, exoskeletons, or endoskeletons
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Muscles surround a fluid-filled body cavity that supports the muscles
examples: annelids and certain cnidarians |
Hydrostatic skeletons
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hard body covering made of chitin
exampels: arthropods |
exoskeleton
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structural support iside the body
exampels: sea stars and other echinoderms |
endoskeleton
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how do inverterbrates reproduce
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sexually or asexually
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