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Study
G6 Ch L4 Animal Systems
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What is circulation?
The movement of important materials throughout the body.
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Why would the circulation of a cold-blooded animal slow down at night?
Lack of solar energy.
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What is a hydrostatic skeleton and which organisms have them?
Water bones; fluid-filled cavity surrounded by muscle fibers; cnidarians, worms, some mollusks.
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What happens to an animal’s exoskeleton as the animal grows?
They are shed and replaced as they are outgrown.
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Discuss the different ways that invertebrates digest and excrete food.
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Where does respiration take place?
The lungs.
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What is an exoskeleton and which organisms have them?
outside skeleton; hard body covering; arthropods, insects, mollusks, arachnids, etc.
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Why is excretion of wasteful materials important in the body?
They have no value and may be poisonous to cells.
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What is the difference between open and closed circulation?
Open: blood not entirely enclosed within the vessels; closed: blood entirely enclosed within the vessels.
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Find and explain an example of diffusion in the kitchen.
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