Flatworms are this, they have no coelom

Nematodes do not have segments, but they do have these two things

This is a membrane that surrounds the internal organs

This is a sac containing hard particles that help grind soil and food before passing them to the intestine

Flatworms belong to this phylum

Flatworms do not have organs for doing these two things

These roundworms cause various diseases in plants and animals

This is a tonguelike organ with rows of teeth

Earthworms can detect these two things

Roundworms belong to this phylum

During this process, body parts that have been lost due to damage or predator attack can regrow

Hookworm infections occur when people walk like this on contaminated soil

These, such as clams, do not have a radula

Fan worms are this

Members of this phylum include snails, slugs, clams, octopuses and squids

Flukes are a type of this

Filarial worms cause this disease in tropical areas

Nephridia help mollusks maintain this

Chemicals in a leeches' saliva acts as this, reducing the pain of its bite

All members of this phylum have segments

Behind the scolex are sections called this

Rotifers use these and glands at the tail end secrete a substance used to attach to a surface

Members of this class have 2 shells

These lack a radula

These help change organic matter on the ocean floor into carbon dioxide