NEET BIOLOGY

Detailed explanation-1: -The earthworm is made of about 100-150 segments. The segmented body parts provide important structural functions. Segmentation can help the earthworm move. Each segment or section has muscles and bristles called setae.

Detailed explanation-2: -Segmented Worms: Phylum Annelida. The worms in the phylum Annelida (from the Latin root word annelus meaning ring) typically have complex segmented bodies (Fig. 3.43). The body of an annelid is divided into repeating sections called segments with many internal organs repeated in each segment.

Detailed explanation-3: -The body is divided into three segments with respect to clitellum-preclitellar, clitellar and postclitellar. Earthworms are hermaphrodites i.e., they carry both male and female sex organs.

Detailed explanation-4: -The digestive system begins at the mouth, continues through a pharynx and tubular esophagus to the bulb-like crop and tough-walled gizzard behind it; the intestine extends from the gizzard posteriorly to the anus at the tip of the worm. The space in each segment around the digestive system is part of the coelom.