When, as in the cherry, the different layers of the pericarp are well-defined and largely developed, they received distinctive names ; the outer skin is the epicarp (epi, upon, carpon, a fruit), the middle fleshy part is the mesocarp (mesos, middle) ; and the innermost hard shell is the endocarp (endos, within) ; in other words the pericarp is made up of epicarp, mesocarp, and endocarp. […] In all normal fruits these three layers of the pericarp are present […].