vegetation

Animals in both phyla have distinct tissues, but these are not organised into organs. They are diploblastic, having only two primary germ layers, ectoderm and endoderm. The tiny placozoans are comparable, but they don’t have a everlasting digestive chamber. With few exceptions—in particular Animals, the sponges and placozoans—animal our bodies are differentiated into tissues. These embody muscle tissue, which allow … Read more