Zoological terms

Zoological terms

Terms in relation to animals, such as mammals, birds, reptiles or fish.

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Zoological terms

Ph. platyhelminthes

Zoology; Zoological terms

Flatworms. Body dorso-ventrally flattened; digestive cavity (when not secondarily lost) with a single opening, the mouth. The turbellarians are free-living in the sea and freshwater, a few ...

Sponges. Sessile; no anterior end; some primitive radially symmetrical, but most are irregular. Mouth and digestive cavity absent; body organised about a system of water canals and chambers. Marine, ...

Ph. rhynchocoela

Zoology; Zoological terms

Nemerteans. Long dorso-ventrally flattened body with a complex eversible proboscis apparatus. Digestive cavity with mouth and anus: Marine, with a few found in freshwater and terrestria