EVERYDAY SCIENCE

Detailed explanation-1: -Setae help the worms move. Each segment contains parts of the organism’s excretory, circulatory, reproductive, and nervous system! The head and the rear of the body is not segmented.

Detailed explanation-2: -What are three segmented worms besides earthworms? Earthworms, leeches and lugworms are examples of annelids.

Detailed explanation-3: -Segmented worms are bilaterally symmetrical. Their body consists of a head region, a tail region, and a middle region of numerous repeated segments. Each segment is separate from the others by a structure called septa. Each segment contains a complete set of organs.

Detailed explanation-4: -The nervous system of the earthworm is “segmented” just like the rest of the body. The “brain” is located above the pharynx and is connected to the first ventral ganglion. The brain is important for movement: if the brain of the earthworm is removed, the earthworm will move continuously.