Earthworm Dissection Project

By Don Choi

Objectives

We will explore and learn more about the insides of an Earthworm and how they function.

Background Information

Scientific Name- Lumbricus Terrestris

Habitat- Mostly in Soil

Predators- Moles, Birds, Raccoons, Armadillos, Scorpions, Millipedes

Prey- Dead and Decaying Plant and Animal Matter

Niche- To decompose dead and decaying matter

Ecological Adaptations- Setae (locomotion), Streamlined Shape (living in tight burrows), circular and longitudinal muscles (locomotion

Dissection Pictures

Digestive System

List of Organs

-mouth

-pharynx

-esophagus

-crop

-gizzard

-intestine

-anus

How it Works

Food such as soil enters the earthworm’s mouth where it is swallowed by the pharynx. Then the soil passes through the esophagus, then into the crop where it is stored and then eventually moved into the gizzard. The gizzard uses stones that the earthworm eats to grind the food completely. The food moves into the intestines as gland cells in the intestine release fluids to aid in the digestive process. The intestinal wall contains blood vessels where the digested food is absorbed and transported to the rest of the body.

Location

Big image

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