Ican grow my body back in about two days if cut in half. many scientists believe i do not undergo senescence. what am i?

I can grow my body back in about two days if cut in half this property can be found in organism which reproduce through regeneration. Regeneration is a  mode of asexual reproduction in which the body of organism is split or cut into two or more parts, these parts grow and develop into new organism. It takes place in simple regenerating organisms like hydra and planaria. The organisms being cut or split into parts in maturity is not considered dead but resulted in newly formed organism.

answer; synapse;