Slimy Earthworms
Galilea Galvan 4th period
Objectives
You will learn the internal and external anatomy of an earthworm. You will also learn about its habitat, classification, predator, and prey.
Habitat
Their habitat is mainly the soil where they feed of of dead decay. Their species name is the "Lumbricus terrestris" and they are in the Animalia kingdom.
ADAPTATIONS
- sensory senses
- lose of moisture through skin
- setae for grip
Anatomy
Internal Anatomy
The internal anatomy is involved with the digestive system.
- Gut
- Gizzard
- Crop
- Esophagus
External Anatomy
The external anatomy involves the adaptations which include
- mouth
- segment
- setae
Digestive System
The food enters through the mouth and then goes through the pharynx which sucks in the food. As the food is pumped it passes through the crop and the gizzard. The parts involved are the
- Anus
- Intestine
- Gizzard
- Crop
- Mouth
Worm dissection
Cladogram
Evolution
The cladogram shows how the earthworm is relates to all the other organisms by their outer anatomy.