How blood is important for man
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Blood also fights infections, and carries hormones around the body. Blood is made up of blood cells and plasma. Plasma (pronounced: PLAZ-muh) is a yellowish fluid that has nutrients, proteins, hormones, and waste products. The different types of blood cells have different jobs.
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Blood contains the red blood cells which help carry oxygen around the body.
Hence it is a very important part of the human organ system.
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