What part of an orange do you eat?

Answer 1

You can eat the inside flesh of the orange and some recipes use the thin orange skin called the zest. The only part that isn't tasty is the pith - the white layer between the zest and the flesh.

Answer 2

Generally speaking, the fruit is an ovary which keeps the maturing seeds safe, and later provides nutrients as the ovary dies and the seeds are released for germination. In a peach, the skin is technically the exocarp and the flesh the mesocarp - these are developed from the ovary wall.