The Circulatory System — Biology STD 10 — Question
ICSE BoardEnglish MediumSTD 10BiologyThe Circulatory System1 Mark
Question
Define the following terms: Rh factor
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Answer
Rhesus factor ( $R h$ factor) : Rhesus factor is a substance present in the red blood cells of most people. Such people are said to be rhesus positive ( Rh positive). People who do not have this substance in their blood, are said to be rhesus negative ( Rh negative).
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