How Are Eggs Made? | Attenborough's Wonder of Eggs | BBC Earth?

Eggs are made when a chicken goes through a special process inside its body to create a tiny egg that becomes bigger and stronger until it's ready to be laid.

Imagine you're playing with clay. At first, the clay is soft and small, like a yolk, which is the center of the egg. Then, around the yolk, the chicken adds layers of albumen (that’s the white part) and shell membranes, like wrapping your clay in paper and plastic.

The shell forms last, like putting on a hard coat of paint. The chicken uses special materials from its body to make this shell strong, kind of like how you might use glue to stick pieces together so they don’t fall apart.

Once the egg is all wrapped up and ready, it travels down a tube in the chicken’s body called the oviduct, which is like a slide that helps move the egg out. Finally, the chicken pushes the egg through a small opening at the end of its body, just like when you push a toy car out of a tunnel!

After that, the egg can sit in a nest or be collected by humans to become breakfast!