What is the Xvid codec: The Xvid Codec (formerly capitalized differently: XviD) is a video encoding and decoding (playback) codec designed to compete with the popular DivX codec.
The heart is located in the chest between the lungs behind the sternum and above the diaphragm. It is surrounded by the pericardium. Its size is about that of a fist, and its weight is about 250-300 g.he heart is located in the chest between the lungs behind the sternum and above the diaphragm. It is surrounded by the pericardium. Its size is about that of a fist, and its weight is about 250-300 g.
The heart is located in the thoracic cavity, in the portion of the chest known as the mediastenum-the region between the pleural sacs and containing all the thoracic viscera except the lungs.The pericardium is the thin sac or membrane which contains the heart and the roots of the great blood vessels.hen you refer to a body cavity, you would say the heart lies in the thorax or thoracic cavity. Within that cavity, it lies within the mediastenum, and is surrounded by the pericardium.