The skeletal framework of porifera is ……………

The skeletal elements constitute ……………of dry weight.

The common name of phylum porifera is ____

Skeletal element are

List out the three characteristics of porifera.

What are skeletal elements ?

Each skeletal muscle is covered by

Write the general characters of the phylum porifera.

Assertion (A): Vigorous exercise after a meal can cause indigestion or abdominal cramps. Reason (R) : When exercising vigorously, blood is rerouted from the digestive organ (food or no food) to the capillary beds of the skeletal muscles where it is needed immediately.

Canal system in porifera is not concerned with ……………….. .