Injury to cervical spine may also lead to loss of cervical lordosis. A whiplash while driving motor vehicle, direct trauma on the neck can all contribute to muscle spasm and loss of curvature of cervical spine. Osteoporosis is another important factor that may cause abnormality in cervical spine curvature.
A close up of an eye showing the capillaries. noun. The definition of a capillary is a small blood vessel that is part of the network of the small arteries and small veins, or an extremely thin tube through which nothing thicker than a human hair can pass.
Capillaries are the smallest of blood vessels. Their walls consist of a single layer of endothelial cells and the smallest have a single endothelial cell wrapped around to join with itself. These permit a single red blood cell to pass through them but only by deforming itself. Capillary endothelial cells vary in structure depending upon the tissue type in which they are found. Continuous capillaries are the most common (i.e.muscle, fat, nervous tissue) have no transcellular perforations and the cells are joined by tight nonpermeable junctions.