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.
The spine is comprised of several small bones, called vertebrae, stacked on top of each other. The purpose of the vertebrae is to establish the structure of the spine. In between each vertebra is a disc and a joint, which allow the vertebrae (and ultimately the spine) to move and bend easily.