A CPU socket is made of plastic, and comes with a lever or latch, and with metal contacts for each of the pins or lands on the CPU. Many packages are keyed to ensure the proper insertion of the CPU. CPUs with a PGA (pin grid array) package are inserted into the socket and the latch is closed.
exists and is an alternate of . Answers.comÂ® is making the world better one answer at a time. The thoracic cavity is divided into right and left parts by a median partition called the mediastinum and contains the heart, the thymus, the trachea, the esophagus, and other structures such as blood vessels and nerves.
The thoracic cavity contains three internal chambers: a single pericardial cavity and a pair of pleural cavities (Figure 1-11a). These cavities are lined by shiny, slippery serous membranes. The heart is surrounded by the pericardial cavity. The relationship between the heart and the cavity resembles that of a fist pushing into a balloon (Figure 1-11b). The wrist corresponds to the base (attached portion) of the heart, and the balloon corresponds to the serous membrane that lines the pericardial cavity. The serous membrane is called the pericardium. The layer covering the heart is the visceral pericardium, and the opposing surface is the parietal pericardium.