The human blood is divided into__________ groups?
Correct answer: B. Four groups
- A. Two groups
- B. Four groups
- C. Three groups
- D. Five groups
Explanation
The basic ABO blood-group system divides human blood into A, B, AB and O, making four groups. The Rh factor is a separate classification, such as positive or negative.
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About Human Body and Health
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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