Principles of Biology
Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 26.4, Problem 1TYK
Summary Introduction

Introduction:

Poriferans are most commonly called sponges. They are among the oldest known animal fossils. They have a feeding system that is unique to them. They are characterized by tiny pores that are present on the outer walls. They don’t have an organ system, hence, they lack muscles, nervous system or circulatory system.

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