Human respiratory system
This picture is screenshot of ncert book · Air in enter in body through nasal passage · The pass through the trachea, rings of cartilage. · Rings of cartilage insure the air passes don’t collapse · After that rings of cartilage divide into two parts each parts enter in each lungs called bronchi · Bronchi divide into multiple of branches called bronchioles. · Each bronchioles contain balloon like structure called alveoli · Air coming by passing the pathway of nose, trachea, larynx, pharynx, bronchi, bronchioles come into alveoli which is balloon like structure which expand · The numbers of blood vessels are connected with alveoli which absorb the oxygen and diffuse co 2 in it. · Hemoglobin contain in blood which have higher affinity to oxygen. · The bronchi, bronchioles, alveoli, are existing under the lungs which are protected by ribs. Aerobic respira