A thoracic organ that has variable lobation and is the primary respiratory organ of mammals.

Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood.

Lobular organ the parenchyma of which consists of air-filled alveoli which communicate with the tracheobronchial tree. Examples: There are only two instances, right lung and left lung.

Lobular organ, each instance of which has some pulmonary acinus as its essential morphological unit. Eaxmple: There are right and left lungs.

One of a pair of organs in the chest that supplies the body with oxygen, and removes carbon dioxide from the body.

One of a pair of viscera occupying the pulmonary cavities of the thorax, the organs of respiration in which aeration of the blood takes place. As a rule, the right lung is slightly larger than the left and is divided into three lobes (an upper, a middle, and a lower or basal), while the left has two lobes (an upper and a lower or basal). Each lung is irregularly conical in shape, presenting a blunt upper extremity (the apex), a concave base following the curve of the diaphragm, an outer convex surface (costal surface), an inner or mediastinal surface (mediastinal surface), a thin and sharp anterior border, and a thick and rounded posterior border.

The anatomy of the respiratory system can be divided into 2 major parts, airway anatomy and lung anatomy. Airway anatomy can be further subdivided into the following 2 segments: The extrathoracic (superior) airway, which includes the supraglottic, glottic, and infraglottic regions The intrathoracic (inferior) airway, which includes the...

Lung, in air-breathing vertebrates, either of the two large organs of respiration located in the chest cavity and responsible for adding oxygen to and removing carbon dioxide from the blood. In humans each lung is encased in a thin membranous sac called the pleura, and each is connected with the...