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lungsclick to hear

Respiratory organs formed of extensible tissue, in which air from the nasal and oral cavities is carried, ensuring oxygenation of the blood.
lungs lower lobe main bronchus lobe bronchus trachea oblique fissure upper lobe terminal bronchiole pleural cavity parietal pleura visceral pleura

lower lobe click to hear

Section of the left lung separated from the upper lobe by the oblique fissure.

main bronchus click to hear

Channel leading from the trachea; it allows air to enter and exit the lung, and branches out inside the lung.

lobe bronchus click to hear

Branch of the main bronchus ending in a pulmonary lobe and dividing into smaller and smaller bronchi.

trachea click to hear

Muscular cartilaginous tract that is a continuation of the larynx; it divides into two main bronchi, each of which ends in a lung, and allows air to pass.

oblique fissure click to hear

Deep ridge bounding the upper and lower lobes of the left lung and at the back of which the visceral pleura lies.

upper lobe click to hear

Section of the left lung separated from the lower lobe by the oblique fissure.

terminal bronchiole click to hear

Final branch of the bronchus having no cartilage and ending in small air pockets (alveolae) where gases are exchanged with the blood.

pleural cavity click to hear

Space between the two pleurae containing a lubricating fluid (pleural liquid); it facilitates their sliding and thus aids breathing.

parietal pleura click to hear

Outer elastic layer of the pulmonary casing; it adheres to the thoracic wall and the diaphragm.

visceral pleura click to hear

Inner elastic layer of the pulmonary casing covering the lung and fissures; its elasticity allows the lung to change size.