What is the main waste product created by the human body that the respiratory system releases?
CO2
What forms the Respiratory System (2 parts)?
Respiratory Tract & Lungs
When air reaches the lungs it must be clean, humid, and warm. What parts of the Respiratory Tract prepare the air this way?
Nasal Cavity warms air with blood. Mucous in the Nasal Cavity and the Trachea purifies and humidifies air.