Table of Contents
What are the 3 classes of mollusks How are they different?
The major classes of living mollusks include gastropods, bivalves, and cephalopods (Figure below).
- Gastropods. Gastropods include snails and slugs. They use their foot to crawl.
- Bivalves. Bivalves include clams, scallops, oysters, and mussels.
- Cephalopods. Cephalopods include the octopus and squid.
What are three Mollusca examples?
Molluscs include mussels, scallops, oysters, periwinkles, whelks, squid, clams, snails, and octopus.
What are the different characteristics of Mollusca?
Mollusca Characteristics
- They are mostly found in marine and freshwater.
- They exhibit organ system level of organization.
- Their body has a cavity.
- The body is divided into head, visceral mass, muscular foot and mantle.
- The head comprises of tentacles and compound eyes.
- The body is covered by a calcareous shell.
What are the types of molluscs?
Classification
| Class | Major organisms |
|---|---|
| Gastropoda | all snails and slugs including abalone, limpets, conch, nudibranchs, sea hares, sea butterflies |
| Bivalvia | clams, oysters, scallops, geoducks, mussels, rudists† |
| Polyplacophora | chitons |
| Cephalopoda | squid, octopuses, cuttlefish, nautiluses, Spirula, belemnites†, ammonites† |
What are the 3 main body regions of mollusc describe each region?
The mollusk body can generally be divided into three regions: the head, the foot, and a cluster of internal organs called the visceral mass. The visceral mass includes many of the organs mentioned in the previous concepts such as the stomach, the heart, the nephridia, and the gonads.
What three characteristics do all molluscs share that make them molluscs?
Main characteristics of Mollusca : There are three distinct body zones: a head-foot, a visceral mass and a mantle.
What are the 7 classes of mollusks?
Mollusks have well developed body organs (nervous system, circulatory system, respiratory system, etc.) but lack body segmentation. There are seven classes of Mollusks: Monoplacophora, Polyplacophora, Aplacophora, Gastropoda, Scaphapoda, Bivalvia and Cephalopoda.
What are facts about mollusks?
Facts About Mollusks. Mollusks are interesting creatures that are found almost in all kinds of weathers with or without shells. Snails, squids, shellfish and their relatives belong to the mollusk group. Mollusks are soft-bodied invertebrates that have shells to protect them.
What are the important characteristics of Mollusca?
One of the characteristics of mollusca is having a soft body and is protected by a hard shell that is bilaterally symmetrical.
Are clams mollusks?
Clams, snails, slugs, mussels, oysters, and clams are all considered to be mollusks. Squid and octopi are also mollusks but we put them on a different page because they are very cool and actually somewhat intelligent. Clams are not known for their intelligence.