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9 Cards in this Set
- Front
- Back
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Diagram and label the structures of a planarian.
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Head- senses and responds to changes in the environment Eyespots- sensitive to light and enable animal to respond to amount of light present Sensory Cells- located on each side of head, can detect food, chemicals, and movement in the environment Flame Cells- excess water is removed. Water collects in tubules, and leaves through pores in the body surface. Cilia- located on ventral surface, help pull animal along or move Pharynx- muscular tube that extends through the mouth, used to take in food into digestive system
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Explain why a tapeworm doesn't have a digestive system.
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They live in intestines surrounded by digested food.
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Discuss the adaptive advantage of a nervous system for a free-living flatworm.
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It enables the worm to sense food and appropriate habitat as it swims
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Examine the life cycle of a parasitic fluke, and suggest ways to prevent infection on a rice farm.
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Workers could wear boots and gloves. Human wastes should be kept out of the water.
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How might an organism that has no mouth or digestive system interact with other organisms in its environment?
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This organism would most likely be a parasite
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replacement or regrowth of missing body parts
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regeneration
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in planarians, the tubelike, muscular organ that extends from the mouth; aids in feeding and digestion.
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pharynx
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knob-shaped head of a tapeworm
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scolex
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a section of a tapeworm that contains muscles, nerves, flame cells, and reproductive organs.
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proglottid
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