EVERYDAY SCIENCE

Detailed explanation-1: -Cephalization is the clustering of sensory organs at the anterior; a body plan that arose because animals use forward motion, and so this end is the first to encounter the environmental stimuli to which an organism must react.

Detailed explanation-2: -Most kinds of animals have particularly important sets of sense organs-such as eyes, ears, and sensory tentacles-at their anterior end. This is easy to understand because when an animal moves forward in its environment, its anterior end is the first to make contact with new dangers or opportunities.

Detailed explanation-3: -Cephalization is an evolutionary trend in which, over many generations, the mouth, sense organs, and nerve ganglia become concentrated at the front end of an animal, producing a head region. This is associated with movement and bilateral symmetry, such that the animal has a definite head end.

Detailed explanation-4: -Sense organs around the front end or head help bilaterally symmetrical animals find food. Bilateral symmetry also helps animals avoid enemies.

Detailed explanation-5: -Cephalization is the phenomenon in which an organism will have their sensory organs concentrated at one end of the body. This process occurs over many generations. Cephalzation is present in all vertebrates and in some invertebrates such as flatworms.