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You are here: Home Nature/Science Evolution Animal Development

Animal Development

This poster provides an excellent introduction to animal development. The primary emphasis is on the invertebrates. This poster uses a tree branching system that incorporates "nodes." They are the point at which the tree branches. Each node is a physical characteristic. All of the animals that share that characteristic constitute a clade. For example, the scientific name for animals is Metazoa. All share a common physical characteristic, which is that they have two cell layers, which distinguishes them from plants, which but one. The new cladistics classification system is used to present an overview of the primary clades. The only animals with two cell layers are the sponges. They make up the Parazoa clade, which is the same as the Poriferan phyla. The next step in animal development is the the development of a third cell layer (the trioblastic layer.) which provides the basis for anther clade. All other animals have a hollow ball embryo. They constitute the Eumetazoa Clade. This branching presentation continues through to the last clade, which is accompanied by a brief description of the physical characteristics of its members. This last clade corresponds to the phyla and the phyla name is cited instead of the clade name. This is because taxonomy, comparative anatomy and many other life science classes still use the traditional classification system.


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Animal Development Click to zoom in

Animal Development
Content-Intensive Poster
Item: EDU40
In Stock: Yes
24 x 36 in.
$7.95