Wall Mounted Units. These wall mount network cabinets and sub-d boxes utilize the extra wall space found in corporate data centers. Choose from our double swing sub-D boxes, wall mounted swing racks, sub-distribution wall boxes, local distribution frame cabinets, or wall mounted unit frames. Accepts all 19 rack mount equipment.
The diaphragm separates the thoracic cavity containing the heart and lungs, from the abdominal cavity and performs an important function in respiration: as the diaphragm contracts, the volume of the thoracic cavity increases and air is drawn into the lungs.tructure [edit]. The diaphragm is a dome-shaped structure of muscle and fibrous tissue that separates the thoracic cavity from the abdomen. The dome curves upwards. The superior surface of the dome forms the floor of the thoracic cavity, and the inferior surface the roof of the abdominal cavity.
Upper respiratory tract: This includes the nose, mouth, and the beginning of the trachea (the section that takes air in and lets it out). Lower respiratory tract: This includes the trachea, the bronchi, broncheoli and the lungs (the act of breathing takes place in this part of the system).The organs of the lower respiratory tract are located in the chest cavity.They are delineated and protected by the ribcage, the chest bone (sternum), and the muscles between the ribs and the diaphragm (that constitute a muscular partition between the chest and the abdominal cavity).he organs of the lower respiratory tract are located in the chest cavity. They are delineated and protected by the ribcage, the chest bone (sternum), and the muscles between the ribs and the diaphragm (that constitute a muscular partition between the chest and the abdominal cavity).