As well as old leases, you should keep anything that documents the landlord-tenant relationship or supports the items you report on your tax return. If the IRS audits your tax return and you cannot produce the correct verification documents, you may be liable for additional tax and penalties.
The facet joints link the vertebrae together and give them the flexibility to move against each other. The facets are the bony knobs that meet between each vertebra. There are two facet joints between each pair of vertebrae, one on each side.
Spinal muscles are made up of tissue that contracts when stimulated. When spinal muscles contract, the neck and back are able to move forward, backward or from side-to-side; as well as bend, twist and extend. This wide range of motion is made possible due to a complex system of muscles, ligaments, tendons, and bones.