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1 What are the four main blood groups?
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2 In degrees Celsius, what is the accepted normal temperature for the human body?
3 In centimetres, what length of head hair does the average person grow in a year?
4 Which is the longest bone in the human body?
5 Which organ produces insulin?
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6 A typical adult skeleton has how many bones: a) 206 b) 216 c) 226?
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