Table of Contents
What is the purpose of studying to dissect an earthworm?
Purpose: In this lab, you will dissect an earthworm in order to observe the external and internal structures of earthworm anatomy, whilst following the all-important lab safety procedures.
What PPE is necessary for dissecting an earthworm or a squid?
Latex or nitrile gloves protect hands from contact with the specimen but also keep dirt from hands away from the earthworm. Some individuals choose to wear other protective equipment as well.
Can you dissect live earthworms?
Earthworms are a great introductions to invertebrates and an easy dissection to start with. The organs and structures are so easy to see and examine. If your students are interested in animals and their anatomy at all, you can do dissections even without a curriculum!
What structures help earthworms form cocoons?
Adult (sexually mature) earthworms have a distinct swelling called a clitellum. It is located about one-third of the way down the earthworm. The clitellum is often white or orange in colour. It produces most of the material secreted to form earthworm cocoons.
Are earthworms Autotrophs or Heterotrophs?
Examples of detritivores include fungi, worms, and insects. There are two subcategories of heterotrophs: photoheterotrophs and chemoheterotrophs. Photoheterotrophs are organisms that get their energy from light, but must still consume carbon from other organisms, as they cannot utilize carbon dioxide from the air.
How do earthworms breathe?
How do worms breathe? Through their skin – but only if it’s kept moist. A worm’s skin is covered in mucus that helps them absorb oxygen. This is why they prefer to stay underground and come to the surface after rain.
What are 2 type of PPE personal protective equipment that you use for dissections of the fetal pig?
Anyone performing a dissection or handling preserved specimens should wear the following PPE: gloves, safety glasses or goggles, and an apron.
Do worms have eyes?
No, not really. Instead, they have cells called receptors that can sense whether it’s light or dark. This allows worms to tell if they’re underground or above ground.
How many hearts do earthworms have?
Heartbeats: Worms don’t have just one heart. They have FIVE! But their hearts and circulatory system aren’t as complicated as ours — maybe because their blood doesn’t have to go to so many body parts. Moving around: Worms have two kinds of muscles beneath their skin.