The draining lava left long, tube-like caverns. Of the four caves in this particular cluster, only Boyd Cave is now open to hikers. Arnold Ice Cave is filled with ice. Skeleton and Wind Cave were open to hikers until 2007, when they were gated closed to prevent vandalism and protect hibernating bats.
On the other hand, asthma is an ongoing chronic condition that has acute flare ups and chronic pulmonary insufficiency due to airway reactions that cause the bronchial tubes to be partially obstructed. This results in shortness of breath, chronic cough, frequent chronic bronchitis, chronic pneumonia and wheezing.
Dyspnea comes from the Latin word âdyspnoeaâ which means shortness of breath. It is associated with diseases in the respiratory and cardiovascular system. Normally, our body regulates our breathing via the medulla oblongata in the brainstem. Dyspnea is also experienced when resting or exerting an effort especially when doing an activity. Dyspnea is also classified into chronic and acute. Chronic dyspnea is when the difficulty in breathing lasts for a month or more while acute dyspnea is a month or less.