A chemical foreign to the biological system of an individual.

A cluster of alveoli at the end of a tiny respiratory airway in the lung.

An adjective that is generally used to refer to an event of sudden or severe onset and short duration.

Tubular structures within the neck (trachea) and lungs (bronchi, bronchioles, bronchioli) that allow passage of air into and out of the lungs.

A defect of melanin production that results in little or no color (pigment) in the skin, hair, and eyes.

A medium sized protein that blocks the destructive action of a group of proteins called proteases. AAT is the primary blocker of neutrophil elastase, a powerfully destructive protease released from ne [..]

A inherited disease characterized by reduced levels or the absence of AAT in the blood and tissues that results in lung and liver disease.

Mobile cells that normally reside within alveoli and perform a number of critical functions in health and disease. Alveolar macrophages serve a critical function in surfactant homeostasis by removing [..]

Tiny sac-like air spaces in the lungs where transfer of carbon dioxide from blood into the lungs and oxygen from air into blood takes place.

Benign tumors of the kidney and are composed of blood vessels, smooth muscle cells, and fat cells.