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Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda. The members are known as molluscs or mollusks (/ˈmɒləsk/). Around 85,000 extant species of molluscs are recognized.
- How will you describe the animals called mollusks?
- What are the 3 main parts of a mollusk?
- How many species of mollusks are there?
- Are octopus mollusks?
- Why is an octopus classified under Mollusca and not under Arthropoda?
- What is the anatomy of a mollusk?
- What type of animal is in class Polyplacophora?
- What type of larva is found in Mollusca?
- Is a jellyfish a mollusk?
- Is a starfish a mollusk?
- 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?
- Are lobsters mollusks?
- Is a squid a mollusks?
- Is a slug a mollusk?
How will you describe the animals called mollusks?
Most mollusks, including snails, clams, oysters, and mussels, have shells. ... The name mollusk, which is derived from a Latin word meaning “soft,” refers to this large, soft body mass. The mantle is a thick covering of tissue that surrounds the visceral mass and has glands that secrete the shell, if the animal has one.
What are the 3 main parts of a mollusk?
The mollusk body can generally be divided into three regions: the head, the foot, and a cluster of internal organs called the visceral mass.
How many species of mollusks are there?
The molluscs (also called mollusks) compose the large phylum of invertebrate animals known as the Mollusca. Around 85,000 extant species of molluscs are recognized.
Are octopus mollusks?
octopus, plural octopuses or octopi, in general, any eight-armed cephalopod (octopod) mollusk of the order Octopoda. The true octopuses are members of the genus Octopus, a large group of widely distributed shallow-water cephalopods.
Why is an octopus classified under Mollusca and not under Arthropoda?
Answer: Octopuses can camouflage very well in their surroundings. They have ink glands that they use to defend themselves or escape from predators. They show all the characteristic features of Phylum Mollusca and are triploblastic, bilaterally symmetrical, and found in various regions of the ocean.
What is the anatomy of a mollusk?
The generalized mollusc is bilaterally symmetrical and has a single, "limpet-like" shell on top. The shell is secreted by a mantle covering the upper surface. The underside consists of a single muscular "foot". The visceral mass, or visceropallium, is the soft, nonmuscular metabolic region of the mollusc.
What type of animal is in class Polyplacophora?
Chitons are molluscs and are related to slugs and snails (gastropods), mussels and oysters (bivalves), and squids and octopuses (cephalopods). Within the phylum Mollusca, chitons belong to a distinct group known as the Polyplacophora.
What type of larva is found in Mollusca?
veliger, larva typical of certain mollusks such as marine snails and bivalves and a few freshwater bivalves. The veliger develops from the trochophore (q.v.) larva and has large, ciliated lobes (velum).
Is a jellyfish a mollusk?
question_answer Answers(2)
Ans: Phylum mollusca include soft bodied animals with hard shell Eg: snails, octopus, mussels, oysters. Phylum Coelenterata contain special structure called coelenteron where the food digested.It include jelly fish and sea anemones.
Is a starfish a mollusk?
Starfish belong to the phylum Echinodermata. Mollusks are a separate phylum of animals. Although both phyla are made up of invertebrates, differences in their anatomy are why starfish are classified as echinoderms and not mollusks.
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.
Are lobsters mollusks?
Crustaceans are aquatic animals that have jointed legs, a hard shell, and no backbone. Examples include crab, crayfish, lobster, prawns, and shrimp. Most molluscs have a hinged two-part shell and include clams, mussels, oysters, and scallops.
Is a squid a mollusks?
Cephalopods are a group of molluscs that include the pearly chambered Nautilus, squids, and the octopus.
Is a slug a mollusk?
slug, any mollusk of the class Gastropoda in which the shell is reduced to an internal plate or a series of granules or is completely absent. The term generally refers to a land snail. ... Marine gastropods of the subclass Opisthobranchia are sometimes called sea slugs (see opisthobranch).
