Cork and cork cambium (cork producing cell layer) are external Cortex-this is the primary tissue of the plant stem Phloem & Xylem are the inner most part and are concerned with carrying fluid and nutrients up and down the plant. Source(s): http://en.wikipedia.org/wiki/Bark. Orinoco Â· 9 years ago.
Malocclusion and bruxism are the most common causes of TMJ disorders. 1  Emotional stress is often the underlying cause of a TMJ disorder, as it can contribute to people either consciously or unconsciously tightening facial and jaw muscles and grinding or clenching their teeth.
If chronic pain is a problem in your life, TMJ may be the cause of it. Suffering from neck pain, jaw pain, headaches, and worn down teeth are all symptoms of TMJ disorder. Come to Drs. Ken & Marnie Collins to discover if an imbalance within your jaw joint is the true cause of your chronic pain.