Digesting Earthworm Knowledge

The Digestive System, By Will Medina, Ms. Vu


Objective: The objective of dissecting an Earthworm is to figure out the anatomy and the processes used by the earthworm to digest food. In my presentation, we will dive deep into the worm’s digestive system and see how it works.

Background Information

Background Information:

Scientific Name: Lumbricus terrestris

Habitat: in soil of meadows, woods, and sometimes lawns

Predators: ants, fly larva , termites, rats, snails, slugs, moles, spiders, mites, birds, mice, turtles,sow bugs and snakes

Prey: manure, dead plant material, and dead animals

Niche: earthworms break down dead matter and act as decomposers

Adaptions: The earthworm ejects its pharynx from its mouth in order to get food. They formed a stream line body with setae that help the worm move though the soil more easily.

What Make up the Digestive System of a Earthworm

  1. Gizzard - grinding food
  2. Crop - food storage
  3. Anus - where wastes exit
  4. Pharynx - muscle to suck in dirt
  5. Intestine - digestion of food
  6. Pharyngeal Muscles - supports pharynx which sucks in food
  7. Esophagus - tube where food is passed from mouth to crop
  8. Mouth - opening for food to enter

Earthworms and Taxonomy

The Scientific name is Lumbrucis terrestris, Kingdom: Animalia, Phylum: Annelida, Class: Clitellata, Order: Haplotaxida, Family: Lambricicdae, Genus: Lumbricus, Species: Terrestris

Pictures and Video of Earthworm Dissection

Earthworm Dissection Lab

Interesting Facts and More

Interesting Facts

  • Earthworms contain no lungs
  • Earthworms breathe through there skin
  • Each earthworm is both male and female
  • they can produce both sperm and egg