Ключевые слова: ache, adult, ail, atrophy, attend, background, bandage, body, bone, brawn, concept, danger, decline, degenerate, degeneration, deterioration, elderly, gesture, harm, heal, health, healthy, inflame, inflammation, injury, knee, leg, lifestyle, marrow, medulla, muscle, old man, ordeal, pain, painful, pang, person, physical, problem, rheumatism, ribs, risk, sting, supervise, swell, synovial, take, treat, weak, white,