Worms are commonly found living in soil.
What does it eat?
Worms get their nutrients from things in the soil such as decaying matter and leaves.
How does it breathe?
Worms must stay moist in order to breathe since they absorb oxygen through mucous on their skin.
Fun fact:
Earthworms are both male and female because they produce both egg and sperm.
Anus- excretes waste
Clitellum- excretes sac that holds eggs
Semenal vesicle- hollow organs that hold semen
Pharynx- muscle that sucks in food
Crop- holds food
Gizzard- breaks down the food
Septa- structural segments
Dorsal blood vessel- main blood vessel towards the rear of worms body
Position your preserved earthworm dorsal side up and pin it down through the first segment and then again further back behind the clitellum. Cut a slit in the dorsal surface near the posterior pin. Using fine scissors extend the cut forward to the first segment. Be careful not to cut too deep. Starting at the first segment, cut the septa (thin membranes) that internally divide the segments, so the skin can be laid flat. Use additional pins to hold the integument open and expose the organs. Continue to lay the skin back until you have uncovered a centimeter or so of the intestine.
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