No, a snail is a mollusk. A mollusk can be described as an invertebrate animal (an animal without a backbone), with a soft body usually enclosed in a shell.
Are molluscs mammals?
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 are mollusks classified?
Mollusks can be segregated into seven classes : Aplacophora, Monoplacophora, Polyplacophora, Bivalvia
Which of the animals is a mollusk?
Mollusca is one of the most diverse groups of animals on the planet, with at least 50,000 living species (and more likely around 200,000). It includes such familiar organisms as snails, octopuses, squid, clams, scallops, oysters, and chitons .
Are mollusks vertebrates?
Mollusks are invertebrates that have a mantle — a body structure that excretes a shell or protective coating for the animal.
What are the 5 main classes of Mollusca?
The Phylum Mollusca consist of 8 classes: 1) the Monoplacophora discovered in 1977; 2) the worm-like Aplacophora or solenogasters of the deep sea; 3) the also worm-like Caudofoveata ; 4) the Polyplacophora, or chitons; 5) the Pelecypoda or bivalves; 6) the Gastropoda or snails; 7) the Scaphopoda, or tusk shells; and 8) ...
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.
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.
Is a scallop a mollusk?
Bivalve mollusks (e.g., clams, oysters, mussels, scallops) have an external covering that is a two-part hinged shell that contains a soft-bodied invertebrate. ... Like fish, bivalve mollusks breathe through their gills. As filter feeders, bivalves gather food through their gills.
Why is Snail a Mollusca?
The majority of gastropods have a single, usually spirally, coiled shell into which the body can be withdrawn . ... The shell of these creatures is often what is recovered in a fossil dig.
Do molluscs have a spine?
Invertebrates are animals that don’t have a spine . Animals that have spines are called vertebrates. Humans and other mammals are vertebrates, along with fish, birds, reptiles and amphibians, for example.
Do molluscs have bones?
The shells you find littered along the beach are actually the ‘skeletons’ of invertebrate animals called mollusks. Unlike the internal skeleton of humans, mollusks actually have an external skeleton . This exoskeleton protects the animal’s soft inner body parts and acts as a sight for muscle attachment.
Is squid a mollusk?
Cephalopods are a group of molluscs that include the pearly chambered Nautilus, squids, and the octopus.
What is the common name for Mollusca?
| Common Name(s): mollusques [French] | molusco [Portuguese] | molluscs [English] | mollusks [English] | Taxonomic Status: |
What color is a gastropods blood?
As in other molluscs, the circulatory system of gastropods is open, with the fluid, or haemolymph, flowing through sinuses and bathing the tissues directly. The haemolymph typically contains haemocyanin, and is blue in colour .
What do you call a mollusk without a shell?
Mollusks without shells include squid, banana slugs, and octopi . Some mollusks are terrestrial, occurring in most environments on earth, while others live in the water for some or all of their life.
