A contractual provision in an insurance policy that denies coverage for certain perils, persons, property or locations. Most exclusions exist simply to remove coverage for above-average risks which are not anticipated in average rates and premiums. In some cases, the coverage is available for an additional charge. Common policy exclusions include: war and acts of war, self-inflicted injury and aviation.
Intervertebral disk. An intervertebral disk acts as shock absorber between each of the vertebrae in the spinal column by keeping the vertebrae separated when there is impact from activity. They also serve to protect the nerves that run down the middle of the spine and intervertebral disks. There are a total of 24 disks in the human spine.
The annulus fibrosus is the tougher outer layer of the disc. It is made up of interwoven fibers. The nucleus pulposus is the gel-like inner layer of the disc. This gel is made of water and proteoglycans, and it is the part of the disc that most absorbs and cushions your movements.Several analogies have been used to describe the parts of the intervertebral disc.he nucleus pulposus is the gel-like inner layer of the disc. This gel is made of water and proteoglycans, and it is the part of the disc that most absorbs and cushions your movements. Several analogies have been used to describe the parts of the intervertebral disc.