Because if it all stays in then your body will keep in this posions gass.
diffusion
Material moves from the respiratory system to the circulatory system by diffusing across a membrane in the air sacks called alveoli.
Cilia are the tiny hairs that sweep dust and dirt out of the respiratory system.
Air sacs are part of the respiratory system
Respiratory System
the respiratory system
Material moves from the respiratory system to the circulatory system by diffusing across a membrane in the air sacks called alveoli.
The respiratory system is the organ system that moves air into and out of your body.
Air moves through the pharynx, which is part of both the respiratory and digestive systems. In the digestive system, the pharynx plays a role in swallowing as it helps direct food and liquid into the esophagus.
Air can be taken into the respiratory system at the mouth and the nose.
Mucus in the nose helps trap particles entering the respiratory system. The hairs/cilia of the respiratory system also filter incoming air.
The system that exchanges oxygen and carbon dioxide between blood and air is the respiratory system. This process occurs in the lungs, where oxygen is taken in from the air we breathe and carbon dioxide is released from the blood into the air we exhale.