GENERAL HISTOLOGY

Detailed explanation-1: -Achatina (Lissachatina) fulica is a common giant land snail of India and the Indopacific islands. The anatomical organisation of Achatina is more or less similar to that of Pila although they belong different orders of the class Gastropoda. The anatomical peculiarities in Achatina are due to adaptation to land life.

Detailed explanation-2: -The phylum Mollusca is the second-largest animal phylum, with over 100, 000 species. The molluscs include many familiar animals, including clams, snails, slugs, and squid, as well as some less familiar animals, like tusk shells and chitons (Fig. 3.51 A).

Detailed explanation-3: -Mollusks: Mollusks are soft-bodied invertebrates that belong to the phylum Mollusca. They are usually completely or partially encased in a calcium carbonate shell secreted by the soft mantle that surrounds the body. The two examples of mollusks are Pinctada (Pearl oyster) and Octopus (Devilfish).

Detailed explanation-4: -Achatina achatina, commonly known as the giant African snail, also known as the giant tiger land snail, and gigantocochlea, is a species of large, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinidae. The name “Achatina” is from “achates", Greek for agate.

Detailed explanation-5: -The phylum Mollusca is the second most diverse phylum after Arthropoda with over 110, 000 described species.