What are the body parts of the phylum Mollusca?
The four important body parts in the mollusk could be listed as: Shell, Mantle, Visceral Mass and Foot.
What is the basic body structure of the main types of mollusc?
The basic body structure, consisting of a foot, visceral mass, and mantle, is similar in most mollusks. The foot is located below the visceral mass. The external shell consists of three layers. The thin outer layer, called the periostracum, is made of a tough hornlike material and serves to protect the lower layers.
What are the three body parts of the phylum Mollusca members?
Over 100,000 species of mollusk live today. Their body structure of a head, visceral mass, mantle and foot distinguishes mollusks within the animal kingdom.
What are the 2 major parts of the phylum Mollusca?
Phylum Mollusca
- Wandering down the beach looking for shells is one of the favorites past time of any beach goer.
- Shell-producing mollusks are divided into two main groups: Bivalves, which are clam-like animals with two shells, and Gastropods, which are snail-like animals with one shell.
What are the 4 main body parts of a mollusk?
Summary. The body plan of a mollusk usually consists of a head region, a muscular foot, and a visceral mass of internal organs that is often contained within a dorsal shell. Each class possesses some variation on this basic plan. The organization of the gastropod body is very similar to the basic body plan of mollusks.
What type of larva is found in Mollusca?
Trochophore larva is the larva found in mollusca and annelids.
What are the 3 body parts that are found in every mollusk in some form what is the function of each of these body parts?
In general, mollusks have 3 body regions: a head, a visceral mass, and a “foot.” The head contains the sense organs and “brain,” while the visceral mass contains the internal organs.
What is the main characteristic that all Mollusca have in common?
Main characteristics of Mollusca : Unsegmented soft body with bilateral symmetry. Presence of an internal or external shell. A toothed tongue (made mostly of chitin) called the radula. A mantle which is a fold in the body wall that lines the shell.
Which of the following belong to phylum Mollusca?
The animals belonging to the phylum Mollusca are apple snail, pearl oyster, devil fish, tusk shell, etc.
What are five characteristics of phylum Mollusca?
Molluscs (also know as mollusks) are soft-bodied, bilaterally symmetrical, segmented, coelomate animals; usually shelled having a mantle, ventral foot, anterior head, and a dorsal visceral mass.
What are the four classes of mollusks?
The study of mollusks is called malacology. There are four main classes in the phylum mollusca , gastropods , bivalve, cephalopod and Polyplacophora. Gastropods include nudibranches , slugs and snails. They compose over one third of the mollusk group and most are single spiral shells but some have no shells.
What organism belongs to phylum Mollusca?
The different classes under phylum Mollusca include: Bivalvia Gastropoda Cephalopoda Monoplacophora Amphineura Scaphopoda
What are the characteristics of molluscs?
Characteristics of molluscs. unsegmented soft body. most have internal or external shell. have a mantle – a fold in the body wall that secretes the hard prtesctive shell. muscular foot and/or tentacles. have a radula – a toothed structure used to grate food.
What phylum is closely related to arthropods?
Phylum Onycophora. ( Velvet Worms ) 70 species an ancient phylum à has changed little since the Cambrian (560MY) believed to be a phylum closely related to arthropods. have chitin cuticle on outside of body antenna mandibles tracheae similar nervous sytem haemocoel annelid like simple eye at base of antennae.