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The earthworm’s ‘brain’. Earthworms have a simple nervous system. The cerebral ganglion is connected to a ventral nerve cord that runs the length of the body. Each segment is connected to this cord, allowing earthworms to move and respond to light, touch, chemicals, vibrations and more.
An earthworm is a soil-dwelling terrestrial invertebrate that belongs to the phylum Annelida. The term is the common name for the largest members of the class (or subclass, depending on the author) Oligochaeta.
In this article we will discuss about the external and internal anatomy of earthworm. This will also help you to draw the structure and diagram of earthworm. External Anatomy of Earthworm: The body of Pheretima is nearly circular in cross-section and varies from 7 to 8 inches (18-19 cms) in length.
The segmented body parts provide important structural functions. Segmentation can help the earthworm move. Each segment or section has muscles and bristles called setae. The bristles or setae help anchor and control the worm when moving through soil.
11 sty 2024 · The body of an earthworm is elongated, cylindrical, and segmented, typically consisting of over 100 circular and nearly identical segments. One of the distinguishing features of earthworms is their specialized setae or bristles, which protrude from each segment’s ventral surface.
Earthworm structure. An earthworm consists of a digestive tube housed within a thick cylindrical muscular tube that forms the body. The body is divided into segments, and furrows on the surface of the body mark the division between each segment.
An earthworm is a segmented worm; a terrestrial invertebrate belonging to the phylum Annelida. They are the common inhabitants of moist soil and feed on organic matter. Earthworms are commonly called as farmer’s friend.
