With a mean diameter of around 2700 km and a mass of 214080 Â± 520 x 1017 kg, Triton is the largest of Neptuneâs moons, and the only one large enough to achieve hydrostatic equilibrium (i.e. is spherical in shape).
Some conditions causing restrictive lung disease are: 1  Interstitial lung disease, such as idiopathic pulmonary fibrosis. 2  Sarcoidosis, an autoimmune disease. 3  Obesity, including obesity hypoventilation syndrome. 4  Scoliosis. 5  Neuromuscular disease, such as muscular dystrophy or amyotrophic lateral sclerosis (ALS).
Doctors classify lung disease as either obstructive or restrictive. The term obstructive lung disease includes conditions that hinder a personâs ability to exhale all the air from their lungs. Those with restrictive lung disease experience difficulty fully expanding their lungs.