The mantle (the inner portion of the mantle to be exact).
Mollusks have a mantle, which is a thin layer of tissue that covers their body and secretes the shell in shelled mollusks. The mantle plays a key role in respiration, excretion, and shell formation in mollusks.
The thin layer of tissue that covers the body of a mollusk is called the "mantle."
Mollusks have a mantle, which is a protective layer of tissue that covers their soft body. The mantle plays a role in shell formation and can also secrete mucus for locomotion or defense.
The visceral mass of a mollusk is surrounded by the mantle, a tissue that secretes the shell in many species. This structure provides protection for the internal organs and helps regulate water and gas exchange.
It is actually only three common structures since not all mollusks have shells. Here it is: Head- structure that contains the mouth, brain and sensory organs Foot- muscular structure that extends from the body and is used for movement Mantle- fleshy tissue that covers and protects the internal organs. It also secretes the shell for most mollusks :) B) =3 -_-
Mollusks are members of this phylum that are overall soft-bodied animals. Their bodies are typically covered by a thin layer called the "mantle" that secretes a hard shell in some species.
As the mollusks grows the shell around it grows to accommodate the larger size. There are three layers to a shell, a proteinaceous periosteum, a prismatic layer, and an inner pearly layer.
All mollusks possess a soft body covered by a hard shell, a muscular foot for movement, and a mantle that secretes the shell. These characteristics distinguish mollusks from other phyla in the animal kingdom.
I believe it is the MANTLE
The mantle is the fold of tissue which protects the inside mass. If a shell is not present, then the mantle forms it.
Mollusks generally have a soft body enclosed in a protective shell made of calcium carbonate. The body consists of a muscular foot for movement, a visceral mass for digestion and reproduction, and a mantle that secretes and maintains the shell. Some mollusks, like snails, also have a radula for feeding.
Cephalopods