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).
Hyperinflated lungs can be caused by obstructions in the passages that deliver air to your lung tissue. Air gets trapped within the lung and causes it to overinflate. Hyperinflation can also occur when the air sacs in your lungs become less elastic, which interferes with the expulsion of air from your lungs. One of the most common causes of hyperinflated lungs is chronic obstructive pulmonary disease (COPD) â a disorder that includes emphysema. Certain lung problems, such as asthma and cystic fibrosis, also can cause hyperinflation. In some cases, lungs may appear hyperinflated on X-rays for reasons unrelated to lung function. If you aren't experiencing shortness of breath, there's probably nothing to worry about.