Question

define blood and blood cells??

Answer 1

The blood is the red fluid which is made of blood cells, plasma etc.

Blood cells are the cells which gives a human body energy

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Answer 2

blood is a fluid matrix which consist of plasma with red cells, white cells and pkatlets floating in it .
blood's cells are red blood cells( carries oxygen and is red in colour due to presence of heamoglobin and the life span is about four months ) and white blood cells ( kills germs and protect the body from disease and is of white colour. its life span is less)