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 can be taken into the respiratory system at the mouth and the nose.
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.
Mucus in the nose helps trap particles entering the respiratory system. The hairs/cilia of the respiratory system also filter incoming air.
The diaphragm is the organ of the respiratory system that doesn't touch air.