Similar Material g 5/10 p. 29 What’s in a Heartbeat? The Lifetime of Mammals Awake!—1973 That Amazing Organ—Our Heart! The Watchtower Announcing Jehovah’s Kingdom—1984 Made to Beat Forever Awake!—1979 Physical Fitness—Is It Worth the Effort? Awake!—1972 What a Pacemaker Did for Me Awake!—1979 Heart Attack—Coping with Our Modern Plague Awake!—1975 The Marvels of the Circulatory System Awake!—2001 Coping With Heart Troubles Awake!—1979 More Blood, More Brainpower Awake!—1980 Determined to Serve Jehovah With a Complete Heart The Watchtower Announcing Jehovah’s Kingdom—1986