MEDICAL ENCYCLOPEDIA. 1  Back pain - returning to work. 2  Back pain and sports. 3  Compression fractures of the back. 4  Lifting and bending the right way. 5  Lumbosacral spine x-ray. 6  Returning to sports after a back injury. 7  Spinal fusion. 8  Spinal fusion - slideshow. 9  Vertebroplasty - slideshow.
The mucociliary escalator is one of the major defense mechanisms, which protect the lung, and if the mucociliary escalator fails, it increases the risk that the normal and potentially pathogenic, inhabitants of the nose, throat and the back of the mouth, will descend into the lung, resulting in a potentially life-threatening pneumonia ( Anatomy and Physiology, 2013, p. 139).
Intercalated discs Function/Purpose. The primary role of the cross-bands is to hold the adjacent cells together by providing sites of strong adhesion. The gap junctions promote diffusion of ions between cells and allow waves of depolarization to spread over the entire heart by passing from cell to cell.ntercalated discs Description. The cross-bands contain the following components that act as cell-cell junctions: 1  Fascia adherens: These are majorly the anchoring regions for actin. 2  Once attached, the thin filaments of actin bind to the sarcomeres of the cardiac muscles.