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.
Wear and tear on joint cartilage is the major cause of osteoarthritis. Collagen makes up 95% of joint cartilage. The more collagen there is in the joints, the less chance is there for the development of osteoarthritis.ear and tear on joint cartilage is the major cause of osteoarthritis. Collagen makes up 95% of joint cartilage. The more collagen there is in the joints, the less chance is there for the development of osteoarthritis.