Question

what is mean by red blood cells

Answer 1

Red blood cell (RBC) is one of the components of our blood. It is very essential for our body because it carries haemoglobin, which carries oxygen to our body tissues. It also gives the blood it's red colour. RBC also removes carbon dioxide from our body through the lungs by the process called diffusion. The RBCs are produced by bone marrow present inside of our bones. Hence, it is an important component of blood and our body.

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Answer 2

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$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \texttt{Red blood cells (RBCs), also known as} \\ \texttt{ Erythrocyte are a type of blood cell which } \\ \texttt{are made in the bone marrow. These cells contain } \\ \texttt{the protein that is called Hemoglobin. Hemoglobin } \\ \texttt{carries oxygen to the body parts from the lungs. } \\ \texttt{Red blood cells also remove carbon dioxide from } \\ \texttt{the body by transporting it to the lungs.}$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \texttt{The red blood cell lives an average of } \\ \texttt{100-120 days in human-body. In the adult} \\ \texttt{human-body, there are some 5.2 million red } \\ \texttt{blood cells per cubic millimetre of blood.}$