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6 Cards in this Set
- Front
- Back
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closed circulatory system
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a circulatory system in which the heart circulates blood through a network of vessels that form a closed loop; the blood does not leave the blood vessels, and materials diffuse across the walls of the vessels.
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open circulatory system
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a circulatory system in which the circulatory fluid is not contained entirely within vessels; a heart pumps fluid through vessels that empty into spaces called sinuses.
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three main body parts of an arthropod
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head, thorax, and abdoman.
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Relationships between a parasite & host
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a parasite eats a host.
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4 characteristics of Athropods
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a segmented body with specialized parts, joined limbs, an exoskeleton, and a well developed nervous system.
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three functions of neurons
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•Senses changes both in and outside the body (the sensory function).
•Interprets and explains the changes (the integrative function). •Responds to the interpretation by making muscles interact and glands secrete hormones or other chemicals into the bloodstream (the motor function). |
