Similar Material g80 12/22 pp. 10-11 Is Running Your Heart’s Desire? What Muscles Can Do, and Can’t Do Awake!—1980 Muscles—Masterpieces of Design Awake!—1999 Your Amazing Circulatory System Awake!—1974 That Amazing Organ—Our Heart! The Watchtower Announcing Jehovah’s Kingdom—1984 Our Muscles—Mystery of Creation Awake!—1970 Heart Attack—Coping with Our Modern Plague Awake!—1975 Physical Fitness—Is It Worth the Effort? Awake!—1972 Coping With Heart Troubles Awake!—1979 If Only Your Lungs Could Talk! Awake!—1971 Wonderfully Made to Stay Alive Awake!—1988