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1 and hence called the cartaginous through the larynx region rered by a thin elastic sound box. Dux which helps in sound he entry of food into cartilaginous flap swallowing giotts up to the mid-thorache larynx. Trachea is a straight tube ic vertebra into a right cavity, which divides at the level of repeated divisions to form left primary bronchi. Each bronchi hioles ending up in verm the secondary and tertiary bronchi primary, secondary and thin terminal bronchioles. The s are supported by incompletery bronchi, and initial ronchiole gives rise to a numblete cartlaginous rings. Each larised bag-like structures of very thin, Irregular-walled bronchi, bronchioles and alveols alveoli. The branching lave two lungs which are covered by a double layered pleura, al fluid between them. It reduces friction on the lung-surface. pleural membrane is in close contact with the thoracic F4gure 17.1 Dlagrammatic view of human respiratory system (sectional vlew of the left lung is also shown)

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Updated on: Oct 10, 2022