Atherosclerosis is not a disorder of the bone. It is a condition in which fats, cholesterol, and other substances get deposited in the walls of the artery, which can lead to clogging of arteries. While arthritis is the inflammation of the joints of bones. Osteoporosis is the disorder which leads to weak bones and reduced bone mass and Rickets is the softening and weakening of bones due to lack of vitamin D in the body.