The following points highlight the two types of germinal layers of the animals. The types are: 1. Segmentation 2. Development. Germinal Layers: Type # 1. Segmentation: Segmentation is division or differentiation of the body into distinct portions called segments. It is of two types: metameric segmentation and pseudo-metamerism. I. Metameric Segmentation (True metamerism or True segmentation): It is a type [...]
In this article we will discuss about:- 1. Levels of Organisation Found in Animals 2. Body Plans of Animals. Levels of Organisation Found in Animals: 1. Protoplasmic or Acellular Level: The organisation is at the level of protoplasm. It is present in protozoans. 2. Cellular Level: The body consists of many cells which may be similar or show minor division [...]
The below mentioned article provides biology notes on Eucoelomates. The animals which possess true coelom are called eucoelomates or coelomates. The true eucoelomates is a body cavity which arises as a cavity in embryonic mesoderm. In this case, the mesoderm of the embryo provides a cellular lining, called coelomic epithelium or peritoneum, to the cavity. The eucoelomates is filled with [...]