How Do Chicks Breathe in the Egg? (Air Sac Explained)

Have you ever wondered how a baby chick breathes while it’s inside of an egg? You’re not alone. This is actually a great question. But do you know what’s even better? The answer.

How Do Chicks Breathe in the Egg?

Chickens breathe in the egg through a tiny opening called the allantois, which connects the air sac (lungs) to the amniotic fluid.

The allantois is a part of the developing chick that helps grow organs like the intestines and kidneys. When you crack an egg open, you can see this allantois as a small sack inside the shell. It’s usually located near one end of the egg, but sometimes it’s closer to the center.

When you look at an egg from above, there are two halves — the upper white half and a lower translucent half with a dark spot in it. This is where blood vessels supply oxygenated blood to the embryo through veins that carry deoxygenated blood away from it. The embryo gets oxygen through these blood vessels and sends carbon dioxide back through them as well.

Can Chicks Suffocate in the Egg?

No, chicks can’t suffocate in the egg.

Chicks have a special respiratory system that lets them breathe even before they hatch. The egg has an air cell for the chick to use as a place to breathe and get oxygen from, even if it’s not being incubated.

Chicks don’t need to be able to walk around or move their heads while they’re still in their eggs; they can breathe just fine without that ability.

If you notice a chick stuck in its shell and unable to move around, it’s most likely not that it has suffocated but rather that it is still trying to hatch out of the egg. This happens when the chick tries to break through too early and gets stuck in its shell as a result.

Are Eggs Porous?

Eggs are porous, but not in the way most people think. The pores in an eggshell are called micropores and they allow oxygen to seep through the shell and into the developing chick’s bloodstream. It’s how birds breathe while they’re incubating their eggs.

But micropores are too small for anything but oxygen molecules to pass through them. That means no matter how much you want your baby chicks to be able to breathe inside their shells before they hatch, they won’t be able to do so until they break through the shell on their own.

Are Chicks Eating While Inside the Egg?

Some people believe that a chick starts to eat while still inside its shell. It’s true that a developing chick needs to eat, but it doesn’t happen this way.

In fact, if you crack open an egg before it has hatched, you won’t find a live chick inside. Instead, you’ll see something called “morula” or “blastula.” This is where all of the cells have formed and started dividing into more specialized cells needed for different parts of the body.

The yolk sac forms at this stage (which is why it looks like a big blob). This sac contains all of the nutrients needed for the chick until it can digest food after hatching.

The inner cell mass forms next. This will eventually become muscle tissue, blood vessels and organs like your heart and lungs. It also has another job — forming a blastopore that allows gases to come in and out of the developing embryo (also known as an embryo).

Eggs Come With A ‘Bloom’ Protective Coating

Eggs come with a protective coating called the bloom. It’s there to keep out bacteria and germs, and it makes eggs clean and safe for consumption. Without it, eggs would go bad very quickly.

The bloom is a thin, white film that covers the shell of an egg when it comes out of an ovary. It’s made up of carbon dioxide gas and calcium carbonate, which is what makes them white in color.

The bloom is formed as soon as an egg is laid and continues to cover the egg until it’s ready to be consumed. The bloom protects against bacteria by blocking oxygen from entering through tiny pores in the shell. This prevents bacteria from growing inside the egg while it’s still in its shell, which would make it unsafe to eat.

In Summary

Chicks are able to breathe due to a group of blood vessels between the avian embryo and shell membrane called the allantois. It siphoned off the oxygen which then enters the air cell and is breathed in by the developing embryo.