Question
Describe the composition of human blood.
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Answer
Blood is a fluid connective tissue which circulates in our body. The main components of blood are plasma $(55\%)$ and blood corpuscles $(45\%)$. Plasma is straw-coloured fluid which contains $85-90\%$ water and $5-10\%$ other substances like proteins, salts and hormones.There are three types of blood corpuscles:
- $RBC$ (Red blood cells).
- $WBC$ (White blood cells).
- Platelets.
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