The brain of human adult weighs about_________?
Correct answer: B. 1200 - 1300 gm
- A. 1600 - 2000 gm
- B. 1200 - 1300 gm
- C. 500 - 800 gm
- D. 100 - 200 gm
Explanation
An adult human brain weighs about 1.2 to 1.4 kilograms, although the exact value varies with sex and body size. Therefore, 1200-1300 grams is the closest listed range.
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The human body is studied through its organ systems, including digestion, respiration, circulation, excretion, nervous coordination, reproduction and immunity. Coverage also includes nutrients and deficiency diseases, hormones, blood groups, common infections, vaccines, sanitation and basic first aid, while distinguishing communicable diseases from inherited and lifestyle disorders.
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