Cortisol is produced and secreted by the adrenal glands. Production of the hormone is regulated by the hypothalamus in the brain and by the pituitary gland, a tiny organ located below the brain.
Cruise lines that operate private islands: Celebrity Cruises, Costa Cruises, Disney Cruise Line, Holland America Line, Princess Cruises and Royal Caribbean International. Disney Cruise Line calls at its private island, Castaway Cay, on itineraries from Port Canaveral.
Six cruise lines operate out of Seattleâs seaport: Carnival, Celebrity, Holland America, Norwegian, Princess and Royal Caribbean. All offer Alaska cruises ranging from seven to 14 nights, and some also offer extended land and sea tour packages.