Nematodes are multicellular creatures of the phylum Nemata. They often live in soil, and eat bacteria fungi, or other nematodes. Their physical structure has been described as a “tube within a tube” as they have worm-like bodies with a tubular digestive tract running their length. While they are simply structured, they do possess functioning digestive, nervous, excretory, and reproductive systems. They range in size from 0.3 mm to over 8 m long. The 8 m long one was the largest ever discovered, and was found in the placenta of a sperm whale.
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