i think its cuz
Yes
bad effect may block the site of binding of oxygen with blood
The respiratory system is the system that handles breathing.
The Respiratory System
infections that effect the repertory system
The trachea is the airway in the respiratory system.
no, they do not have a respiratory system
The respiratory system.
Respiratory system
how does the respiratory system work
1. Respiratory system 2. Cardiovascular system
The lungs are part of the respiratory system! they help the circulatory by giving oxygen, but they are just respiratory.