Question

what is the passage of air from atmosphere into the lungs?

Answer 1

THE AIR PASSES FROM THE NOSTRILS TO THE NOSE FROM WHERE IT IS PASSED TO THE WINDPIPE AND THEN TO THE LUNGS. THEY GET FUSED WITH THE SURFACE OF ALVEOLI AND THUS GET MIXED WITH THE BLOOD.

Answer 2

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Answer:

Lungs are located in the chest cavity and separated from stomach and other parts of digestive system by a diaphragm. . During inhalation, rib cage is raised inhaled l air. Cilia sweep it upward and it is swallowe- l from the pharynx into the adjacent oesophagus. Hence os contract and relax which causes change in the nd diaphragm lowers as intercostal muscles hile during exhalation rib cage is lowered, diaphragm moves up, as intercostal muscles relax. To ensure that clean atmospheric air is taken in during inhalation, there are hairs in nose which filtre the air, trapping dirt in the mucus secreted from the epithelial lining. In addition, epithelium in trachea also l consists of ciliated cells. Cilia continuously beat upward to lt sweep the mucus from throat to the pharynx. Special goblet cells secrete mucus to trap the dirt from dirt particles.