Question

Show the path way of air in the form of flow chart

Answer 1

Air passes through nostrils, nasal cavities where some of the tiny dirt particles from the air are removed and the temperature of air is brought close to that of the body. Epiglottis, a flap like structure controls the movement of food and air towards respective passage. When air passes out of the lungs and over the vocal cords it causes to vibrate vocal cords and this produces sound. Wind pipe channeling air to lungs at lower end, the trachea divides into two bronchi on leading to each lung. Each bronchi is further divided into smaller and smallest branches called branchioles. These finally terminate in cluster of air sacs called alveoli in the lungs. Gaseous exchange takes place here as blood capillaries take up oxygen and expel carbondioxide.