How Baby Birds Can Breathe Inside Their Eggs
How bird babies can breathe in their eggs Have you ever thought about how birds can breathe inside their hard eggshells? It's all because of some really clever egg-ineering. Bird eggs have tough shells that hold an egg white and a yolk inside. When the egg is fertilized, the baby grows inside the yolk, getting food from it and the egg white around it. When the baby bird has food and a place to stay, you might wonder what else it needs. There is one more important thing that must be present: fresh air. People and other animals get oxygen through their umbilical cords while they…