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