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6th Mollusks & Worms
6th grade Ch 7
| Question | Answer |
|---|---|
| ___ ___ have long tube-like bodies that are divided into segments | segmented worms |
| Segmented worms | are the simplest organisms with a true nervous system and blood contained in vessels |
| A long digestive tube runs down the length of the ___ inner body | worm's |
| Worms take in dissolved oxygen from the water through their ___. | skin |
| Examples of segmented worms | earthworms & leeches |
| Mollusks | have soft bodies |
| Most mollusks have a thick muscular foot for ___ or to open and close their ___ | movement; shells |
| ___ have more developed body systems than sponges or worms | Mollusks |
| Mollusks take in oxygen through ___ or ___ | gills; lungs |
| ___ have shells or no shells | Mollusks |
| slug | a gastropod that has no shell |
| snail | a gastropod that has a shell |
| bivalves | mollusks that have two shells |
| invertebrates | do not have a skeleton or backbone |
| cephalopods have a ___ circulatory system. | closed |
| gastropods have a ___ circulatory system | open |
| several species of molllusks produce ___. | pearls |
Created by:
Ms. Phillips
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