Postal Exam 473 / 473E. Study Guide: Yes! This is the biggie â¦ the most popular Postal exam â¦ the one used to fill all over 90% of all Postal jobs, all entry-level Processing, Distribution, Delivery, and Retail positions. Listed below are the actual jobs filled from this exam: 1  PSE Sales, Service, and Distribution Associate.
Osteoarthritis, also known as degenerative arthritis degenerative joint disease, OA, or osteoarthrosis, is a form of arthritis caused by inflammation, breakdown, and the eventual loss of cartilage in the joints-the cartilage wears down over time.
But in general, heredity is not a major reason for osteoarthritis. In some people, osteoarthritis may be triggered by another disease, for example, Paget's disease. Although the main cause of osteoarthritis is known to be weakened bone, joint, and muscle metabolism, the precise causal mechanisms are still unknown.