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

abnormal anatomy aquarelle back biology body comparison curvature curve defects deform deformation diagnosis disease draw drawing drawn education hand healthy human hunchback illustration isolated kyphosis lordosis medical medicine normal orthopedics osteopenia people posture profile right science scoliosis sick sickness side spinal spinalcord spine view watercolor watercolour women wrong