Hedgehogs have a unique respiratory system that helps them to breathe in oxygen and expel carbon dioxide. Their lungs are located in the chest cavity, and they are connected to the trachea. The trachea is a tube that carries air to and from the lungs.
Hedgehogs have a diaphragm that separates the chest cavity from the abdominal cavity. The diaphragm is a muscle that contracts and relaxes to help the hedgehog breathe. When the diaphragm contracts, it pulls air into the lungs. When the diaphragm relaxes, it pushes air out of the lungs.
Hedgehogs also have a pair of nostrils that are located on the snout. The nostrils are used to draw in air. The air then passes through the nasal cavity, where it is warmed and moistened. The warmed and moistened air then travels down the trachea to the lungs.
Hedgehogs have a very efficient respiratory system. They are able to breathe in and out very quickly, and they are able to extract a lot of oxygen from the air. This allows them to be very active animals, even though they are small.