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 walls of the trachea are composed of connective tissue and smooth muscle. A number of C-shaped rings of cartilage, usually between 15 and 20, are contained in the tracheal wall. The C shape is open to the rear of the windpipe due to its nearness to the esophagus. This allows the esophagus to expand toward the front of the throat when food passes through it. The rings of cartilage also keep the trachea from collapsing due changes in air pressure that normally occur during respiration.