1 Answer | Add Yours
Cephalization is the development of a head on an organism's body. Organisms like Porifera or Cnidaria lack a head region. Cephalization is usually found in organisms that are bilaterally symmetrical. These include: the Vertebrates--fish, amphibians, reptiles, birds and mammals. A head region is found in Invertebrates like the arthropods including insects, crustacea and arachnids, in Annelid worms and in Platyhelminthes. Having a head means that usually sense organs are located there and a brain can be found inside the head. This helps to improve an organism's response to stimuli and helps to coordinate and control the body processes.
We’ve answered 315,793 questions. We can answer yours, too.Ask a question