Kingdom of Hadhramaut (violet) in the 3rd century CE during the Sabaean-Himyarite war, it was eventually annexed by the Himyarite Kingdom.
Location of the Heart. Heart is located safely inside the chest cavity which looks like a cage bound by the ribs and breast bone (sternum). The chest cavity is also called as thoracic cavity and it lies between neck and abdomen.
The thymus is an organ composed of two lobes and is located directly in front of the heart and behind the sternum. It is a critical part of the immune system because it trains and modifies T cells that are used by the body to fight foreign materials that can cause sickness.