Flatworms

Flatworms

One type of worm is the flatworm. Worms in the phylum Platyhelminthes are called flatworms because they have flattened bodies. There are more than 18,500 known species of flatworms.

CK-12 (Middle School)

ESSENTIAL QUESTION:

How are flatworms similar to, but different from other invertebrates?
STANDARDS:
RST.1 - Analysis & Evidence, RST.4 - Key Terms

DEPTH OF KNOWLEDGE (DOK) LEVELS:

2,3
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