What is the function of foot in snail?
It lacks legs but moves thanks to a “muscular ventral foot.” The foot has a wave-shaped movement produced by muscular contractions that make the snail “glide” while the foot secretes a slippery mucus that reduces the friction on the surface in which it moves.
What is the function of the molluscan foot quizlet?
What is the foot? Adapted for locomotion, attachment to a substrate. Usually a ventral, solelike structure that effects a creeping locomotion through waves of muscular contraction. Modifications such as laterally compressed hatchet foot of bivalves or funnel for jet propulsion in squids and octupuses.
What is the function of the foot in bivalves?
Some bivalves have a pointed, retractable "foot" that protrudes from the shell and digs into the surrounding sediment, effectively enabling the creature to move or burrow.
What is the function of the molluscan mantle quizlet?
Explain function of the mantle? Primary function being to enclose and protect the internal organs. The mantle leaves room in the mollusks body for the mantle cavity, which holds air or water and serves as a method for respiration.
What is the radula function in mollusks quizlet?
The radula (plural radulae or radulas) is an anatomical structure that is used by molluscs for feeding, sometimes compared rather inaccurately to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food enters the esophagus.
Do all mollusks have a foot?
Most mollusks move with a muscular structure called a foot. The feet of different kinds of mollusks are adapted for different uses, like crawling, digging, or catching prey. Many mollusks have an organ called a radula (RAD you lah), which is a flexible ribbon of tiny teeth.
What is the role of the muscular foot in mussel?
Like most bivalves, mussels have a large organ called a foot. In freshwater mussels, the foot is large, muscular, and generally hatchet-shaped. It is used to pull the animal through the substrate (typically sand, gravel, or silt) in which it lies partially buried.
What does a squid use its foot for?
The tentacles number 8 in octopuses, 10 in squids, and as many as 90 in nautiluses. 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.
What are mollusks quizlet?
mollusk. means "soft bodied. They are soft bodied invertebrates that usually have a shell. Mollusks are found living on land and in fresh and salt water. They include animals such as clams, oysters, snails, slugs, octopus, and squid.
Which of these molluscs commonly have a hinged shell?
Bivalves are mollusks that have two shells hinged together, held by strong muscles. Clams, oysters, scallops, and mussels are bivalves. This type of mollusk does not have a radula. They are mostly filter-feeders.
Which treatment involves radioactive implants inserted into the tumor of the tissue around the tumor?
Internal radiation is also called brachytherapy. A radioactive implant is put inside the body in or near the tumor. Getting the implant placed is usually a painless procedure.