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17 Cards in this Set
- Front
- Back
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invertebrate
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animals without backbones
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bilateral symmetry
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body with 2 similar halves
(ant) |
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radial symmetry
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body parts are arranged in a circle around a central point
(sea anemone) |
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asymmetrical
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animals without symmetry
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ganglia
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groups of nerve cells. They occur throughout the body and control different body parts
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gut
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a pouch lined with cells that release powerful enzymes
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coelom
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a space for the gut. Allows the gut to move food without interference from the movements of the body.
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open circulatory system
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Most mollusks have this. A simple heart pumps blood through blood vessels that empty into spaces in the animal's body, called sinuses.
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closed circulatory system
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Our circulatory system. heart circulates blood through a network of blood vessels that form a closed loop. Cephalopods also have this.
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segment
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identical or almost identical repeating body parts.
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exoskeleton
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An external skeleton made of protein and a special substance called Chitin.
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compound eye
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made of many identical light-sensitive cells
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antennae
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feelers that respond to touch, taste, and smell.
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mandibles
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jaws
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metamorphosis
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the change in for in an insect from egg to adult
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endoskeleton
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internal skeleton similar to what vertebrates have. Usually covered with spines.
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water vascular system
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Uses water pumps to help the animal move, eat, breathe, and sense its environment in echinoderms.
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