9: Porifera and Cnidaria Last updated Aug 1, 2024 Save as PDF 8.3: Intro to Animal Physiology 9.1: The Evolutionary History of the Animal Kingdom Page ID139080 ( \newcommand{\kernel}{\mathrm{null}\,}\) 9.1: The Evolutionary History of the Animal Kingdom9.2: Phylum Porifera9.3: Phylum Cnidaria