Eggs are oval-shaped structures produced by female birds, reptiles, and some mammals. They are commonly consumed as food and are rich in protein, vitamins, and minerals. The most widely eaten eggs come from chickens, but other types, such as duck and quail eggs, are also popular in various cuisines around the world. Eggs consist of a hard outer shell, a protective membrane, egg white (albumen), and the yolk, which contains most of the nutrients. They can be prepared in many ways, including boiling, frying, and baking. Eggs are versatile ingredients in cooking and baking, often used in dishes like omelets, cakes, and custards.