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.
Between two adjacent vertebrae is a disc. In the back of each vertebra are two facet joints, one on each side. The facet joints are designed to allow smooth motion for bending forward. backward and rotating, but also limit excess motion. Muscles and ligaments surround and support the spinal column.