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 With reference to the RBC, which of the following statements is/are correct? Before birth RBC are formed in the liver and spleen. After birth RBCs are formed in the bone marrow. Persons who live at high altitudes have more RBC than those who live in plains.

 With reference to the RBC, which of the following statements is/are correct? Before birth RBC are formed in the liver and spleen. After birth RBCs are formed in the bone marrow. Persons who live at high altitudes have more RBC than those who live in plains. Correct Answer 1, 2 and 3

The correct answer is 1, 2 and 3

Key Points 

  • Red blood cells or erythrocytes are the most important cell of the blood and are the largest in number.
  • It was discovered by Antoine Leuven Hawk that RBC is known as the 'smallest cell' in the human body.
  • Red blood cells are formed in the bone marrow in adult humans, and in the spleen or liver before birth.
  • Red blood contains a protein called 'hemoglobin' and the 'lifespan of RBC' is 20 to 120 days. 
  • The red blood particles (RBCs) are destroyed in the liver and spleen, the spleen is called the 'graveyard of RBCs.
  • In High Altitude -
    • There is a shortage of oxygen when living on a hill situated at a very high altitude.
    • Due to which the body has to prepare more hemoglobin and fulfill the need for oxygen.

Additional Information

  • Platelets are small blood cells, like a plate.
  • Which helps to form a blood clot to stop the bleeding.
  • Platelets also form in the white and red blood cells as well as in the bone marrow.
  • Their life span is about 10 days. The nucleus is not found in them.
  • One cubic mm. Their number is 25 lakhs.​

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