What is cephalization? ( plz.... in easy language )
In the simplest sense, cephalization means having a head. In fact, the term originates from the Greek word for head, kephale. But there's a little more to it than that. Think about how important your head is and what it contains. Internally, it holds your brain, and externally, it has your primary sense organs (your eyes, nose, ears, and mouth). This is the real essence of cephalization, the concentration of nervous tissue into a single, controlling organ and the organization of sense organs into one area at the anterior (head) end of the body as opposed to the posterior (tail end.)
A tendency in the evolution of organisms to concentrate the sensory and neural organs in an anterior head is called cephalization Cephalization is the differentiation of the anterior (front) end of an organism into a definite head. Considered an evolutionary advance, cephalization is accompanied by a concentration of nervous tissue (cephalic ganglion or brain) and feeding mechanisms in the head region that serves to integrate the activities of the nervous system. Some groups of organisms show full cephalization, but because their bodies are not divided into distinct trunks and heads, they cannot be said to possess a distinct anatomical head.