The average human body contains how many pints of blood?
Correct answer: D. 9 to 12 pints
- A. 3 to 5 pints
- B. 5 to 7 pints
- C. 7 to 8 pints
- D. 9 to 12 pints
Explanation
An average adult has roughly 4.5 to 6 litres of blood, which is about 9 to 12 US pints. The exact amount varies with body size, so option d gives the suitable 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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