What are Biramous appendages?
A biramous appendage is one that has two branches. Crustacean biramous appendages have a basal or first portion referred to as the protopod. (Proto means first or early, like prototype, and pod means foot, so protopodite means the first part of the foot). As you move away from the body on a biramous appendage you find a branch on the outside, the exopod (exo means outer), and a branch on the inside, the endopod (endo means inner)