Stack #214907 - Ch. 7 Invertebrates
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on it to display the answer.
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| omnivore | animal that eats both plants and animals
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| radial symmetry | arrangement of body parts in a circle, around a center point. In math: rotoational symmetry.
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| invertebrate | an animal without a backbone
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| carnivore | animal that eats only other animals or their remains
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| bilateral symmetry | arrangement of body parts in halves that are nearly mirror images of each other. In math: line symmetry
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| vertebrate | an animal that has a backbone
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| hermaphrodite | an animal that produces both sperm and eggs in the same body
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| gill | an organ that exchanges carbon dioxide for oxygen in the water
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| open circulatory system | blood circulation system in which the heart moves blood out into open spaces around the body's organs
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| closed circulatory system | blood circulation system in which blood moves through the body in a series of closed blood vessels
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| crop | digestive system sac
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| gizzard | muscular digestive system structure where food is ground up
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| appendage | jointed structure such as a leg, pincer or antenna
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| molting | shedding and replacing of an arthropod's exoskeleton
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| metamorphosis | process in which many insect species chand their body form to become adults
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| epidermis | outer most layer of skin
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| sponges | invertebrate animal that is assymetrical
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| mollusks | soft-bodied invertebrates with bilateral symmetry. They usually have one or two shells.
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| gastropod | Largest group of mollusks, with 1 or no shell (univalves).
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| bivalves | mollusks that have a hinged, two-part shell joined by strong muscles.
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| cephalopods | most specialized and complex mollusks. They have a large, well developed head and a closed circulatory system.
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| segmented worms | worms with bilateral symmetry, a body cavity that holds organs, and two body openings
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| earthworm | segmented worms known as annelids, with tube-shaped bodies that are divided into many segments.
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| marine worms | segmented worms called polychaetes, that live in the ocean.
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| leeches | segmented worms that dont' have setae. They feed on the blood of other animals.
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| arthropods | Animals with jointed appendages. They have bilateral symmetry, segmented bodies, an exoskeleton, a body cavity a digestive system with two openings and a nervous system.
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| insects | arthropods with 3 body regions - head, thorax and abdomen
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| arachnids | arthropods with 2 body regions - head-chest region called cephalothorax and an abdomen. they have 4 pairs of legs with no antennae.
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| centipedes | arthropods with long segmented bodies , antennae, simple eyes, and 1 pair of legs per body segment.
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| millipedes | arthropods with long segmented bodies, antennae, simple eyes, and 2 pairs of legs per body segment.
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| crustaceans | arthropods with 1 or 2 pairs of antennae and mandibles (jaws) used for crushing food. They have 5 pairs of legs: 1 pair of claws and 4 pair of legs. Most live in water.
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| echinoderms | invertebrates with a hard endoskeleton covered by thin, bumpy, or spiny epidermis. They have radial symmetry, a mouth, stomach and intestines.
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Created by:
asarvis
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