Transcription: In the next two lessons, we'll look at the consumers, which are members of the animal kingdom. First, we'll talk about the invertebrates, the animals that don't have backbones. And in the next lesson, we'll cover the vertebrates, or the animals that do have backbones. Phylum peripheral, the sponges. This phylum is characterized by lacking symmetry and organs. Members are filter feeders and consume fine particles through pores. They have a framework which is made of glass-like fibers called spicules. They have specialized cells called collar cells that have tiny flagellum that meet and pump wat ...
(.mp4)