Peter Loewer pairs his fascinating knowledge of backboneless animals with the vivid illustrations of Jean Jenkins in this introduction to the characteristics of invertebrates, amoebas, and other one-celled animals. Ever wonder what sets invertebrates apart from other animals? Aside from their lack of backbone, of course. Peter Loewer takes readers through the ins-and-outs of invertebrate animals in this bright and detailed picture book. With special attention to the physical characteristics, habits, and natural environments of a variety of animals lacking a backbone, The Inside-Out Stomach is the perfect introduction not only to invertebrates, but also amoebas and other one-celled animals.