what is blood....?
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Blood, fluid that transports oxygen and nutrients to the cells and carries away carbon dioxide and other waste products. Technically, blood is a transport liquid pumped by the heart (or an equivalent structure) to all parts of the body, after which it is returned to the heart to repeat the process.
Blood is made mostly of plasma, but 3 main types of blood cells circulate with the plasma:
- Platelets help the blood to clot. Clotting stops the blood from flowing out of the body when a vein or artery is broken.
- Red blood cells carry oxygen.
- White blood cells ward off infection.
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Answer:
Blood is a body fluid in the circulatory system of humans and other vertebrates that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.
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