Earthworm Dissection
Description
In this lab, we looked at the anatomy of an earthworm. We cut it down the middle and looked at its small organs.
Materials
Worm
Tray
Scalpel
Scissors
Tweezers
Pins
Procedure
Too look inside the worm, we had to follow a procedure. We had to cut the worm from the end to the big segment. We had to pin it down and we looked how its body could hold so many organs.
Conclusion/Analysis
This was the worst one so far. The worm was all limp and hard and smelled really bad. It's hard to see its organs so I don't know why we did it.
Ecology
Annelids, also known as worms, can be found in most moist ground areas. They burrow in the ground and mix around the soil and the minerals contained in it. They make tunnels where water and plants can move through and grow. The earthworms are very beneficial when eaten, providing vitamins and minerals for the predator.
Comparative Structure & Function
Earthworms are in the phyla Annelids. They have a complete digestive system which digests what they consume from the soil. They have closed circulation and excrete with their organs. They breathe through their skin, which is why they need a moist place to inhabit. They can reproduce both sexually and asexually.
In this lab, we looked at the anatomy of an earthworm. We cut it down the middle and looked at its small organs.
Materials
Worm
Tray
Scalpel
Scissors
Tweezers
Pins
Procedure
Too look inside the worm, we had to follow a procedure. We had to cut the worm from the end to the big segment. We had to pin it down and we looked how its body could hold so many organs.
Conclusion/Analysis
This was the worst one so far. The worm was all limp and hard and smelled really bad. It's hard to see its organs so I don't know why we did it.
Ecology
Annelids, also known as worms, can be found in most moist ground areas. They burrow in the ground and mix around the soil and the minerals contained in it. They make tunnels where water and plants can move through and grow. The earthworms are very beneficial when eaten, providing vitamins and minerals for the predator.
Comparative Structure & Function
Earthworms are in the phyla Annelids. They have a complete digestive system which digests what they consume from the soil. They have closed circulation and excrete with their organs. They breathe through their skin, which is why they need a moist place to inhabit. They can reproduce both sexually and asexually.