What Kind of Respiratory System Do Reptiles Have?

Reptiles have a unique respiratory system that has evolved over millions of years. They have lungs, but they are not as complex as those of mammals or birds. Instead of having one large lung, reptiles have two smaller lungs that are located on either side of the heart. These lungs are filled with air through the trachea, which is a tube that connects the lungs to the mouth and nose.

The lungs of reptiles are lined with tiny air sacs called alveoli. These alveoli are where gas exchange takes place. Oxygen from the air is absorbed into the bloodstream through the alveoli, while carbon dioxide is released from the bloodstream into the lungs.

Reptiles also have a special organ called the glottis, which is located at the back of the throat. The glottis controls the flow of air into and out of the lungs. When the glottis is open, air can flow in and out of the lungs. When the glottis is closed, air is prevented from entering the lungs.

Reptiles use their lungs to breathe, but they also use their skin to absorb oxygen. The skin of reptiles is thin and covered in scales, which allows oxygen to pass through. This means that reptiles can absorb oxygen from the air around them, even when they are not breathing.