write the composition of blood in 2 marks
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Blood. Blood makes up about 8% of the human body weight. It contains erythrocytes, leucocytes, thrombocytes (platelets) and plasma. The volume percentage of all blood cells in the whole blood is about 45% of adults (hematocrit). The rest consists of liquid plasma (e.g. water, plasma proteins, electrolytes etc.).
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the blood consists of haemoglobin which makes it red and blood is also one of the most essential thing for our body
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