Multiple choice

In human adults, about 5 litres of blood contributes to 7-8% to the body weight. Which among the following statements regarding blood composition is WRONG?

  1. Erythrocytes are the dominant cells in the blood.

  2. Blood platelets perform their functions exclusively in the blood stream.

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

  4. Blood cells have epithelial origin.

  5. Leukocytes can leave the blood stream.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Blood is sometimes considered to be a fluid connective tissue because of the mesenchymal origin of its cells and a low ratio of cells to liquid intercellular substance, the blood plasma.

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