EVERYDAY SCIENCE

Detailed explanation-1: -The simplest body structure in sponges is a tube or vase shape known as “asconoid", but this severely limits the size of the animal. The body structure is characterized by a stalk-like spongocoel surrounded by a single layer of choanocytes.

Detailed explanation-2: -sponge structure The simplest, or ascon, type, found only in certain primitive genera of the Calcarea (e.g., Leucosolenia), is characterized by an arrangement of choanocytes around a central cavity that directly communicates with the osculum. The walls of these sponges are thin, lack…

Detailed explanation-3: -The most basic body plan is called asconoid. In asconoid sponges the two major cell layers surround a fluid-filled cavity called the spongocoel, the large central cavity of sponges .

Detailed explanation-4: -The ‘Olynthus’ is the simplest known type of sponge. It has the simplest type of canal system (ascon). It occurs as a transitory stage in the life history of all calcareous syconoid sponges.