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 trachea is located in the mediastinum. Surgery on organs inside the mediastinum sometimes requires cutting through the sternum. At the back of the anterior mediastinum is the pericardium, which is a thick enclosure that contains the heart. The mediastinum is the central compartment inside the rib cage. Cancer can spread into the mediastinal lymph nodes from the lungs. A CT scan may be performed to identify pneumoperitoneum.