Mysterious signals to bees. Some flowers attract bees with invisible to us colors and special signs. Wild flower begonia looks white to us, and for the bee â blue-green. Bees distinguish ultra-violet rays, which our eyes do not perceive. They see the pattern on the flower evening primrose, which we are not able to distinguish.
Osteoarthritis. A progressive, degenerative joint disease, the most common form of arthritis, especially in older persons. The disease is thought to result not from the aging process but from biochemical changes and biomechanical stresses affecting articular cartilage.
Osteoarthritis. Definition. Osteoporosis is a bone disease. The word âosteoporosisâ literally means porous bones. It is a bone disorder characterized by decreased bone strength as a result of reduced bone quantity and quality.A person with osteoporosis has an increased risk of breaking a bone (fracturing) easily. Osteoporosis is a bone disease in which the amount and quality of the bone is reduced, leading to fractures (broken bones). 2  Osteoporosis produces no pain or other symptoms unless a fracture has occurred.