Don't smoke.
Antimicrobial peptides is one way. Google.com is the other way.
To protect my respiratory system i will not smoke to prevent chronic bronchitis, emphysema and even lung cancer. in this way i can protect my respiratory system. some ailments in our respiratory system are chronic bronchitis, emphysema and lung cancer which is very dangerous
falls out
The lungs are part of the respiratory system or pulmonary system.
exercise can influence the respiratory system in a positive way because exercise gets blood pumping faster and makes the heart stronger. (the heart is a muscle by the way)
Humans must first dissolve the gasses in water (in the alveolii of the lungs) before we can extract it, whereas fish only can get the gasses already dissolved. Also - fish have a one-way respiratory system whereas humans have an in and out respiratory system.
They both have organ system, respiratory system and excrete in a similar way
Yes, the respiratory system provides oxygen to the digestive system.
Cartilage in the respiratory system (usually found in the trachea and some small amounts in the bronchi), is to act as a way to keep the passageways open.
the flow of oxygen and blood are both done in the same way
Smoking increases the elasticity of the lungs.
avoid asthma triggers (my guess)