RBC Full Form

What is the full form of the RBC?

The full form of RBC is the Red Blood Cell. RBCs are human biconcave and nucleus-free cells; they are also recognized as erythrocytes. The iron-rich protein called haemoglobin is found in RBCs, giving the blood to its red colour. The most abundant blood cells formed in the bone marrow are RBCs.

Haemoglobin consists mostly of iron, which is mixed with oxygen, giving the blood red colour. 40-45% of the overall blood volume is occupied by it.

Few points about RBC

  • The blood volume proportion that includes all red blood cells is named hematocrit
  • Roughly 0.5 billion RBCs contain in a single blood drop
  • For each 600 RBC, there are about 40 platelets and one WBC (white blood cell)
  • In the bone marrow, RBCs are constantly produced as they remain in the bloodstream for about 120 days before being eliminated by the spleen or liver
  • The bone marrow makes adequate RBCs to compensate for the deficit caused by removing old RBC
  • A tiny, round, disc-shaped cell which does not comprise a nucleus is a mature human RBC. On a peripheral blood smear, it ranges about 7-8 microns in diameter
  • To move via the smallest blood vessels or blood capillaries, they have a flexible membrane that enables them to change their appearance
  • In an adult human being, there are around 4.5 to 6 million RBC per cubic millimetre of blood volume

Primary Functions of RBC

  • A respiratory pigment that binds to molecules of oxygen or carbon dioxide is RBC
  • It involves transporting oxygen to various tissues and organs of the human body
  • It also extracts carbon-dioxide to be replenished in the lungs from multiple organs and tissues

RBC lifespan

  • RBC has a lifetime of 100-120 days
  • They are eliminated via the circulatory system once their life cycle is over
  • The lifespan of RBCs is shortened when a person suffers from chronic diseases


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  1. this site is very usefull for detailed and clear explanations . With reading these points i am able to answer my teacher question and also i am getting clear and 100% quality notes
    Thank you Byjus