Molluscs By kate katy & ruth

example of molluscs

  • squid
  • octopuses
  • cuttlefish
  • snails
  • slugs
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"mollusc" that exhibits the features common to many species.

This hypothetical mollusc has a mantle, shell, foot and visceral mass. The mantle is a layer of tiss
Molluscs are a group of invertebrates. Scientists estimate that there are more than 100,000 species of molluscs alive today. This makes them the second largest group of animals.

Molluscs have soft bodies. They also have a foot that not many people know about that pushes them along. Many species also have a protective shell made of chitin, proteins and calcium carbonate. The ancestral mollusc is thought to have had a shell but buthis shell has dissapeared on some molluscs over time. Today, over 100,000 living species bear a shell. Molluscs are so varied in form, it is difficult to use a single representative species to make many generalizations about the group's common apperances and structures. Instead, textbooks often describe a hypothetical ue that covers the visceral mass and in many molluscs it contains glands which secrete a hard shell.

The foot is muscular structure located on the underside of the body. The mollusc secretes mucus from the bottom of its foot which lubricates the underlying surface. This helps the mollusc move, a task accomplished by repeated contraction and stretching of the foot muscle.

Do you know why slugs have slime? Its because they need it for movement and it also maeks them harder to eat. Slugs are really cool because they can make there body a differant shape if they need to. WheN Banana slugs mate they do it in a thick blanket of slime and sometimes they even eat eachothers slime too! It may be possibly nutritional too.

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Molluscs are invertebrates that include animals such as squid, octopuses, cuttlefish, snails, slugs, limpets, sea hares, mussels, clams, oysters, scallops, as well as many lesser known creatures. There are nearly 100,000 species of Molluscs making them second largest phylum in the animal kingdom. Some don’t have head or shells.

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Worms

Diagram

Nature's Recyclers
Mold and bacteria and higher level organisms like beetles, centipedes and, of course, earthworms are all busy recyclers. By breaking down organic matter — stuff like dead plants, feces, and decaying animals — they create valuable nutrients necessary for rich and fertile soil. Take it from me, a worm who knows, we are doing you a big favour.

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squid

QUIZ -
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