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An average adult heart is ( 14, 12, 10, 6 ) cm from base to apex, ( 9-12, 6-8, 8-9, 7-9 ) cm at its broadest transverse diameter and ( 4, 6, 8, 7-10 ) cm anteroposteriorly. Its weight varies from ( 280 to 340 g (average 300 g), 230 to 280 g (average 250 g), 200 to 240 g (average 220 g) ) in males and from ( 230 to 280 g (average 220 g), 280 to 340 g (average 300 g), 180 to 240 g (average 200 g), 230 to 280 g (average 250 g) ) in females