osteoarthritis, painful joint and healthy joint

abstract ache anatomical anatomy arthritis backdrop background blue body bone bones brochure care chain chart cover damage diagram disease dna dns extremities extremity femur gene graphic health healthy human hurt ill illustration infection inflammation injury joint knee leg legs limb limbs lower medical normal osteoarthritis pain patella poster posture ray red research rheumatoid roentgen science scientific skeletal skeleton structure surgery symptoms system trauma treat treatment unhealthy vector wound