Question

explain respiratory system

Answer 1

lungs is the main organ of respiratory system it intake o2 and expell co2

Answer 2

Respiration is the process of releasing energy by breaking down food for life activities.Respirarory system allows the inhalation of oxygen - rich air into lungs and exhalation of CO2 from the lungs.It consists of nose ,nostrills, nasalcavity , pharynx , larynx , trachea ,bronchi ,bronchioles, alveolar sacs and alveoli..