Question

shell is formed by secretion of glandular cells in mantal ....elobrate

Answer 1

The shell is formed by secretions of glandular cells in the mantle. Except in the chitons, the shells of all mollusks are basically similar, differing only in certain mineralogical details.

Answer 2

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The shell is formed by secretions of the gland Nerve cells in the Mantle accept in the vjiyons on the shell of the molecules are basically similar the cell is composed of an outer famous declare containing densely packed cells of calcareous material secreted by the edge of the Mantle .
And an inner various layer of thin laminated plates of calcareous material laid down by the entire mental surface .
When very thin nacreous layer lining of the shell is clearly and resistant layer of this material may form around a grain of sand or other reactant that Lodges between the Mantle and the shell this process eventually forms pearl
Pearl oysters of the genus are the most commercially important Pearl formers .the Colossal squid sometimes called the giant crunch squad is believed to be the largest squid species .
it grows to the maximum size of 46 feet long making in the largest known invertebrate

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