and named "Parazoa" af. ar "Sollas". Sponges will not show tissue-grade organization. They will not show Cilia. The choanoderm will show choanocytes which are useful for bringing water currents into the body The development of the canal system, Ostia,...

are present pores are formed. (B) GASTRALLAYER: The inner layer of the body is called 'gastral layer'. It is also called 'choanoderm'. It contains 2 kinds of cells (i) Choanocytes or collar cells (ii) Epithelial cells. Choanocytes: These cells are...

the body. These water currents bring in food and oxygen. The body wall of sycon contains outer dermal layer and inner choanoderm. in between these two layer mesenchyme is present. The body wall is folded regularly and develop a regular canal system....

of lipochrome in chromocyte ccDs. Poriferans are diploblastic animals, they show outer pinacoderm, (dermal layer), inner choanoderm gastral layer) and in between them mesenchyme is present.The mesenchyme contains Amoebocytes and Spicules. On the body of...