watercolor of people with right and wrong posture. man with normal healthy spine and abnormal sick spine in

abnormal anatomy aquarelle back body comparison curvature curve defect defects deform deformation diagnosis disease draw drawing drawn education hand healthy hunchback illustration kyphosis lordosis medical men muscles normal orthopedics osteopenia people physiotherapy position posture profile right scoliosis sick sickness side spinal spinalcord spine sportive unhealthy view watercolor watercolour wrong