Earthworm (Phylum annelida)
Key to parts of diagram:
The mouth is on the left.
To control the movie:
- Symmetry - bilateral.
- Eating - eats dead organic material ingested through mouth
at anterior (left) end.
- Circulation, Respiration and Excretion - The earthworm has
a closed circulatory system.
- Blood flows from the hearts and picks up carbon dioxide allowing the respiratory exchange
with the oxygen that enters the body
by diffusion through the skin.
- This exchange allows the oxygen
to be transported and deposited inside the body tissues by the blood.
- The blood also picks up the liquid waste
inside the earthworm body carrying them to the excretory units from which
they exit the body.
- Digestion - The earthworm has a flow through
- Food enters the digestive
tract through the mouth where it is digested into feces and monomers.
- The feces exit the body through
the anus and the monomers are picked
up by the blood from which they are absorbed by the tissues.
- On the Mac: control-click
- On the PC: right-click
Evelyne Tschibelu 2002