Earthworm 101
Earthworm Dissection-PAP Bio-Ms.Vu
Lumbricus Terrestris
Earthworms are members of the phylum Annelida. They also fall under the class Oligochaeta and subclass Haplotaxida. There are over 3,000 species of earthworms around the world. These invertebrates range in color from brown to to red, and most have a soft body. Earthworms range in size from a few inches long to over 22 feet long. The largest earthworms live in South Africa and Australia.
Objectives
In this lab, students will observe the external and internal structures of the earthworm. They will also focus on the structures and function of its digestive system.
Habitat
The earthworm is most numerous in grasslands, including garden lawns, and is not adversely affected by cultivation.
Predators
Animals such as snakes and birds feed on earthworms. Any insects are also predators of the earthworm.
Earthworm Life Cycle
Earthworm Dissection Tutorial
Earthworm Dissection Lab
External Anatomy
Clitellum, Setae, Sperm duct, Oviduct, Seminal Receptacle, Mouth, Prostomium, Anterior End, Anus, Posterior End, Segments
Digestive System
Mouth, Pharynx, Esophagus, Crop, Gizzard, Intestine
Circulatory System
Heart and Dorsal (and ventral) blood vessel, hearts, mouth