Describe the Location of the Heart in the Thoracic Cavity
In the human being the heart lies just behind and slightly to the left of the sternum breastbone in a double-layered sac called the pericardium. The heart lies in the protective thorax posterior to the sternum and costal cartilages and rests on the superior surface of the diaphragm. Thoracic Duct Thoracic Duct Thoracic Medical Anatomy It averages only about 300 grams in mass. . The adult heart attains its shape and weight between puberty and 25 years of age. It sits on the diaphragm near the middle of the thoracic cavity in what is called the mediastinum. It is about the size of a fist is broad at the top and tapers toward the base 2. The lungs are also contained within their own cavities the pleural cavities and connect to the mouth through the trachea and the thoracic inlet. The heart is located within the mediastinum of the thoracic cavity. 3 Describe the pericardium. Thoracic location o Heart is fist s...