Respiratory System:
The trachea of the Northern fence lizard splits into two bronchi. The lungs are hollow sacs that have internal folds lined with smaller sacs to increase the surface area.
How they breathe:
They are able to breathe by changing the volume of their body cavity. When they contract the muscles moving in their ribs, the volume of their body cavity increases which allows for air to go into their lungs. When the body muscles are contracted, the volume of their body cavity reduces, making air come out of their lungs.
The air goes in the lungs through the bronchial tubes and into the alveoli. The exchange of oxygen and carbon dioxide happens within the alveoli and the air is then released out of the lungs through the same route it entered in.
How they breathe:
They are able to breathe by changing the volume of their body cavity. When they contract the muscles moving in their ribs, the volume of their body cavity increases which allows for air to go into their lungs. When the body muscles are contracted, the volume of their body cavity reduces, making air come out of their lungs.
The air goes in the lungs through the bronchial tubes and into the alveoli. The exchange of oxygen and carbon dioxide happens within the alveoli and the air is then released out of the lungs through the same route it entered in.