Disc herniation is a broad term describing specific changes in a lumbar disc. First, the disc itself needs to be addressed. A disc is the structure between the lumbar vertebral bodies (bones). The disc acts as a pad or cushion for the bone. The outer portion of the disc is made up of a tough fibro-cartilage matrix (the annulus) that is cross-linked in three different directions. In the middle, there is a gelatinous nucleus.
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Mason Jar Specifications. Landi Mason patented Mason jars in Philadelphia in 1858. His jars had screwed-on lids and were designed to make food storage safer by creating an airtight seal. The jars are mass produced and intended for home canning use, though people also use them in craft projects.