Question

In Porifera, generally pinacocytes are found in

• A. Outer epithelium
• B. Inner epithelium
• C. Mesenchyme
• D. All of the above

Answer 1

Answer: (A)

Outer epithelium

Sponges are diploblastic in nature in which outer layer ectoderm is pinacoderm and inner layer endoderm is choanoderm. The pinacoderm is the outermost layer of cells surrounding the body of organisms belonging to the phylum Porifera or sponges. The pinacoderm is formed of the cells, called as the pinacocytes, which are equivalent to the outer epithelium. Thus, the correct answer is option A.