insufficient attemps at respiration by the newborn, bronchial obstruction, or absence of surfactant (a substance secreted by alveoli that maintains the stability of lung tissue by reducing the surface tension of fluids that coat the lung).
Atelectasis is a collapsed or airless condition of the lung which may be caused by obstruction of one or more airways with mucus plugs; by hypoventilation secondary to pain or to ventilation with...
The formation of numerous, closely spaced rills due to the uneven removal of surface soil by streamlets of running water. Also known as rilling; rill wash; rillwork.