MP Board notes-Respiration
Respiration in human beings(by lungs) Lungs are the main respiratory organs where exchange of gases takes place. Following is the detail of human respiratory system. Nasal cavity In human beings air containing oxygen enter the body through nose.There are present two holes in our nose called nostrils. The nostrils opens behind in the nasal cavity. The nasal cavity lies above the buccal cavity.The function of nasal cavity is to moisten, warm and trap dust particles present in the air coming in it through nostrils.The nasal cavity opens behind in thepharynx. 2.Pharynx Pharynx is a common passage for both the respiratory and digestive system. It leads into the larynx (voice box) . Larynx It is also known as voice box. It lies at the top of trachea. The pharynx opens into the larynx through a slit like opening called glottis . The glottis is protected by a leaf shaped flap of cartilage called epiglottis . Epiglott...