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olya98
An average man's heart weighs 10 ounces, and the brain weighs 3 pounds. 3 lbs and 10 ounces is approximately 1.65 kilograms.

Hiya there! :) The average amount of man's brain is 1,378 grams or 3 pounds. For the average heart of man is 300 grams but for a athletic person it is 500 grams.

Hope I helped! B)