A: The thoracic cavity protects and holds the lungs, heart, trachea, esophagus, endocrine glands, thoracic aorta and the pulmonary artery. Enclosed by the ribs, breast bone and vertebral column, it is the second-largest hollow space of the human body.
Refrigeration is necessary for hard boiled eggs if they eggs are not to be consumed within a few hours. Hard-cooked eggs in the shell can be refrigerated up to one week. They last much longer at both room temp and refrigerated, if they aren't cooked.
Standard Recommendation. Once you've cooked hard-boiled eggs, leave them out for no more than 2 hours without refrigeration. On a hot day, this time period is just an hour. The eggs keep in the refrigerator for a week.