Diversity of animal

Animals’ varied appearances are mainly superficial; only six fundamental body plans can account for the confusing range of known forms, some of which are genuinely strange. These blueprints, which restrict the size and complexity of the animals, are formed during the embryonic phases of development. These basic patterns of organisation are defined by symmetry, the quantity and relative growth of tissue layers, the existence and kind of body cavities, and several elements of early development. Readmore.