Multiple choice

Blood is a fluid connective tissue of the human beings. Which of the following statements regarding blood is false?

  1. Blood cells have an epithelial origin.

  2. Leukocytes can leave the blood stream.

  3. Erythrocytes contribute about 43% of the total volume of the blood.

  4. Erythrocytes are the dominant cells in the blood.

  5. The blood platelets perform their functions exclusively in the blood stream.
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A Correct answer
Explanation

Blood is sometimes considered to be a fluid connective tissue because of the mesenchymal origin of its cells.

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