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The underside of the animal consists of a single muscular "foot". Although molluscs are coelomates, the coelom tends to be small.
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Mollusca.
| Mollusca Temporal range: | |
|---|---|
| (unranked): | Protostomia |
| (unranked): | Spiralia |
| Superphylum: | Lophotrochozoa |
| Phylum: | Mollusca Linnaeus, 1758 |
- Which animal group has a muscular foot?
- Which invertebrate has a muscular foot?
- Do cephalopods have a muscular foot?
- Do annelids have a muscular foot?
- What is muscular foot?
- Does a snail have a foot?
- Why is an octopus classified under Mollusca and not under Arthropoda?
- Is a mollusk a muscle?
- What is a snail classified as?
- Does the octopus have a foot?
- Where is the muscular foot in cephalopods?
- Do Mollusca have circular muscles?
- Are molluscs segmented?
- Is an octopus an annelid?
Which animal group has a muscular foot?
Mollusks have a muscular foot, which is used for locomotion and anchorage, and varies in shape and function, depending on the type of mollusk under study.
Which invertebrate has a muscular foot?
Squid, snails, and shellfish belong to a group of invertebrates called molluscs. These creatures have soft bodies and a muscular “foot” which they use to move around. All molluscs have a mantle, which is a skin-like body organ that covers most of their other organs.
Do cephalopods have a muscular foot?
The class as a whole has become adapted for a free-swimming existence. Cephalopods are able to move about rapidly, and most are aggressive carnivores. ... The rest of the foot forms a muscular funnel, or siphon, which expels water from the mantle cavity, permitting cephalopods to move about by a kind of jet propulsion.
Do annelids have a muscular foot?
The head may have tentacles for sensing the environment and grasping food. There is generally a muscular foot, which may be used for walking. However, the foot has evolved modifications in many species to be used for other purposes. Basic Mollusk Body Plan.
What is muscular foot?
highly muscular organ called the foot, through which muscle fibres run in all directions. The foot of a gastropod is a flat structure used for crawling. Waves of muscular contraction travel along its length, moving the animal slowly over the ground. The foot of a bivalve mollusk is a bulbous…
Does a snail have a foot?
A snail uses its single long, muscular foot to crawl on a layer of mucus-like slime that it secretes. ... These waves of muscle contraction and relaxation travel along the central portion of the foot from tail to head. The waves move much faster than the snail itself, and generate enough force to push the snail forward.
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.
Is a mollusk a muscle?
The adductor muscles are the main muscular system in bivalve mollusks (e.g. in clams, scallops, mussels, oysters, etc.). In many parts of the world, when people eat scallops, the adductor muscles are the only part of the soft parts of the animal which are eaten.
What is a snail classified as?
The majority of gastropods have a single, usually spirally, coiled shell into which the body can be withdrawn. ...
Does the octopus have a foot?
Fanning out from the octopus's head are eight feet -- what we call arms. A spokesperson from the National Aquarium in Baltimore explains the amazing functionality. "The octopus uses its eight sucker-lined arms in a variety of different ways.
Where is the muscular foot in cephalopods?
The foot of the cephalopod has become modified into a muscular siphon and parts of the tentacles and head. They live on the sea floor creeping and scurrying about in search of crabs and other food.
Do Mollusca have circular muscles?
These walls mainly consist of circular muscle fibres that squeeze water out of the mantle cavity when they contract. ... Though many mollusks have shells, most molluscan muscle systems depend on the principle of the hydrostatic skeleton.
Are molluscs segmented?
Mollusks may be primitively segmented, but all but the monoplacophorans characteristically lack segmentation and have bodies that are to some degree spirally twisted (e.g. torsion). ... The Pelecypoda are the bivalve mollusks and include oysters, clams, and scallops.
Is an octopus an annelid?
We will begin our discussion of the coelomate animals with mollusks, which include such animals as clams, snails, slugs, and octopuses. Annelids (figure 45.1), such as earthworms, leeches, and seaworms, are also coelomates, but in addition, were the earliest group of animals to evolve seg- mented bodies.
