Bivalves:
foot In addition to acting as a crawling organ, it can also perform an effective burrowing organ. In the Solemya, the Yoldia has a flat sole on the bottom of the foot, the sides of the sole can be folded into blade-like edges that can penetrate mud or sand and act as a soft-soled burrower.

Which organ helps mollusks crawl?

highly muscular organ called foot, through which muscle fibers extend in all directions. Gastropod feet are flat structures used for crawling. The wave of muscle contraction travels along its length, causing the animal to move slowly across the ground. Bivalve mollusks have bulbous feet…

How do mollusks move?

Most mollusks move a muscular structure called the foot. The feet of different species of mollusks are adapted for different purposes, such as crawling, digging or capturing prey. Many mollusks have an organ called the radula (RAD you lah), which is a flexible, toothed belt.

Which organ did you find in a mollusk?

Most mollusks have two organs unique to this phylum: a specialized feeding organ called the radula and a dorsal layer of tissue called the mantle. Molluscs were the first animals to evolve respiratory and circulatory organ systems.

What is the main organ of mollusk movement?

mollusks have muscular feet, used for locomotion and anchoring, which vary in shape and function, depending on the type of mollusk studied. In shelled mollusks, this foot is usually the same size as the opening of the shell. The foot is a retractable organ and an extensible organ.

Molluscs | Gastropods – Bivalves – Cephalopods |

30 related questions found

What are the 3 main body parts of mollusks?

Mollusk bodies can generally be divided into three regions: head, feet, and a group of internal organs called visceral masses.

What is the only cephalopod with a shell?

cavity nautilus One of six species of nautilus, the nautilus is the only cephalopod (squid, octopus, and close relatives) with a shell. Like most shelled animals, this species can fully retract into its shell when threatened.

Do mollusks hurt?

After discussing this framework in detail, we conclude: Mollusks cannot feel pain Because the nervous systems of mollusks (unlike humans) lack the neural architecture needed to implement the necessary computations defined within this framework.

Are jellyfish mollusks?

question_answer Answers (2)

answer: Mollusca Includes hard-shelled mollusks such as snails, octopuses, mussels, oysters. Phylum Coelenterata contains a special structure called the coelenterazine, where food is digested. It includes jellyfish and anemones.

Do mollusks have brains?

Molluscs, except the most developed cephalopods, no brain in the strict senseInstead, the cell bodies (pericarya) of nerve cells are concentrated in ganglia (ganglia) in important parts of the body. …In gastropods, ganglia are initially dispersed throughout the body.

Why are mollusks so successful?

If success is measured by the number of species and the diversity of habitats they adapt to, mollusks are one of the three most successful groups in the animal kingdom. … mollusks have Evolved unique and highly successful body plan Has a mantle, shells, muscular feet and tongues.

Can mollusks swim?

Although largely marine, bivalves and gastropods include freshwater species. Gastropods have also adapted to land, and thousands of species live entirely on land.Found on rocky, sandy, and muddy formations, mollusks burrow, crawl, stick to the surface, or move freely–swim.

What is the smartest group of mollusks?

The intelligence of squid and octopus. cephalopod Mollusks are considered the most intelligent invertebrates and an important example of advanced cognitive evolution in animals in general.

Do all mollusks have eyes?

In fact, mollusks have the greatest morphological diversity of eye types of all animals, Seven to eleven different lineages with eyes (von Salvini-Plawen and Mayr 1977). Mollusk eyes range in size from less than 0.02 mm (0.00078 in)

Why are snails mollusks?

Most gastropods have only one, Usually helical, coiled shell into which the body can retract…the shells of these creatures are usually found during fossil excavations.

How do cockles avoid moon snails?

It sets itself free because they can be twisted apart by the muscle force of the foot, and it is attached to their shell. How did the first cockle avoid the moon snail? it can kick predators away…it burrows down to get a cockle that has been buried.

Do jellyfish feel pain?

They don’t have any blood, so they don’t need a heart to pump blood. They respond to changes in their surroundings using signals from a neural network beneath the epidermis (the outer layer of the skin) that is sensitive to touch, so they don’t need a brain to process complex thoughts.

Are jellyfish immortal?

« Immortal » jellyfish, Dorney tortoise

To date, only one species has been called « biologically immortal »: the jellyfish Turritopsis dohrnii. These transparent critters roam the oceans around the world and can turn back time by going back to an earlier stage in their life cycle.

What eats jellyfish?

Q: Is there anything that eats jellyfish? Reply: Tuna, Shark, Swordfish, Shovelfish, Sailfish, Ocean Sunfishblue rock fish, turtles and even other jellyfish feed on these gelatinous spheres.

Does cooking lobster live hurt?

cooking them can cause pain, the government says, should be replaced with faster methods of death – such as stunning. Still, even the scientist who conducted the basic research for the government’s decision said he wasn’t 100 percent sure that lobsters felt pain.

Is it painful to eat raw squid?

Octopus feels pain and They feel like they’re being chopped up and eaten aliveIn an article published by Vice, they interviewed Dr. Jennifer Mather, an expert on octopus and squid behavior at the University of Lethbridge, Alberta. « It’s likely that octopuses respond to pain similarly to vertebrates.

Do bugs feel pain when you squeeze them?

As far as entomologists are concerned, insects do not have pain receptors like vertebrates. they don’t feel « pain », but may feel irritated and may feel if they are damaged. Even so, they certainly don’t suffer because they have no emotions.

What eats cephalopods?

cephalopods feed on many people Marine mammals, large fish and seabirds. Sperm whales and other toothed whales feed primarily on squid.

What is the largest cephalopod?

Largest cephalopod specimen ever recorded: 495 kg (1,091 lb) giant squid (Mesonychoteuthis hamiltoni) Next to a fishing boat in the Ross Sea off Antarctica in February 2007. It is shown here in its live state during capture, with the delicate red skin still intact and the mantle typically expanding.

Why do cephalopods have 3 hearts?

Cephalopods have many hearts—three to be exact.two gills push oxygen-Drains blood through the gills, while the whole-body heart pumps oxygenated blood throughout the body. … which becomes very beneficial when conserving oxygen is important.