How Do You Spell Mollusca?

the phylum comprising the mollusks .

Which is correct molluscs or mollusks?

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. The number of fossil species is estimated between 60,000 and 100,000 additional species.

What does the word Mollusca mean?

: a large phylum of invertebrate animals (as snails, clams, and mussels) that have a soft unsegmented body lacking segmented appendages and commonly protected by a calcareous shell.

Is Mollusca a Greek word?

The word mollusc (or mollusk) derives from the Latin word “mollis,” which means “soft .” There are an estimated 200,000 species of mollusk worldwide accounting for nearly a quarter of all marine life. Familiar phylum species include snails, squid, octopuses, clams and oysters.

How do you describe mollusk?

Molluscs are a clade of organisms that all have soft bodies which typically have a “head” and a “foot” region . Often their bodies are covered by a hard exoskeleton, as in the shells of snails and clams or the plates of chitons.

What does arthropod literally mean?

arthropod Add to list Share. An arthropod is an animal with no internal spine, a body made of joined segments, and a hard covering, like a shell. ... The Modern Latin root is Arthropoda, which is also the name of the animals’ phylum, and which means “ those with jointed feet. “

What is the common name for Mollusca?

Is a jellyfish a mollusc?

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.

What Colour is Mollusca blood?

Most molluscs have blue blood because their respiratory molecule is hemocyanin, a type-3 copper-binding protein that turns blue upon oxygen binding. Molluscan hemocyanins are huge cylindrical multimeric glycoproteins that are found freely dissolved in the hemolymph.

Do mollusks have brains?

Molluscs, with the exception of the most highly developed cephalopods, have no brain in the strict sense of the word . Instead, the cell bodies (pericarya) of nerve cells are concentrated in nerve knots (ganglia) in important parts of the body. ... In gastropods, the ganglia originally have been dispersed over the body.

What is the best definition of mollusk?

: any of a large phylum (Mollusca) of invertebrate animals (such as snails, clams, or squids) with a soft unsegmented body usually enclosed in a calcareous shell broadly : shellfish.

Why are mollusks important to humans?

Mollusks are important in a variety of ways; they are used as food, for decoration, in jewelry , and in scientific studies. They are even used as roadbed material and in vitamin supplements. Two natural products of mollusks used for decorations and jewelry are pearls and nacre.

Why are they called arthropod?

Arthropods lack locomotory cilia, even in the larval stages, probably because of the presence of the exoskeleton. The body is usually segmented, and the segments bear paired jointed appendages , from which the name arthropod (“jointed feet”) is derived.

Do humans have chitin?

Mammals, including mice and humans, do not synthesize chitin but possess two active chitinases , chitotriosidase (Chit1) and acidic chitinase (hereafter referred to as “Chia”; alternative name: acidic mammalian chitinase, AMCase) in their genomes ^{34 , 35} .

Are bees arthropods?

Kingdom – Animalia (Metazoa) Honeybees are animals ! Phylum – Arthropoda These animals have exoskeletons and jointed legs. ... They have jointed legs, compound eyes, antennae, exoskeletons, and three-part bodies. Order – Hymenoptera, translating to mean “membraned wings.” This order includes bees, ants, wasps, and sawflies.