With reference to the blood in a normal person, which one of the following statements is correct?

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Q: 26 (IAS/2002)
With reference to the blood in a normal person, which one of the following statements is correct?

question_subject: 

Science

question_exam: 

IAS

stats: 

0,25,47,22,17,8,25

keywords: 

{'white blood cells': [2, 0, 1, 1], 'blood cells': [1, 0, 0, 0], 'blood': [5, 0, 0, 1], 'more platelets': [0, 0, 1, 0], 'veins': [2, 0, 0, 0], 'wbc': [2, 1, 1, 1], 'arteries': [0, 1, 0, 0], 'lymph nodes': [1, 1, 1, 1], 'total volume': [0, 0, 1, 0], 'body': [27, 3, 23, 37]}

Option 1: This statement is incorrect. In fact, veins outnumber arteries and hold more blood volume at any given time because they function as storage vessels.

Option 2: This statement is also incorrect. Blood cells, including red and white blood cells and platelets, make up approximately 45% of the blood`s total volume. The remaining 55% is plasma, a liquid that carries cells and platelets.

Option 3: This statement is inaccurate as well. White Blood Cells (WBCs) are produced not only in the lymph nodes but also in the bone marrow.

Option 4: This is the correct statement. Blood generally contains more platelets than White Blood Cells. An average adult has about 150,000 to 450,000 platelets per microliter of blood, compared to 4,500-11,000 White Blood Cells per microliter.

Therefore, the correct answer is 4 "The blood has more platelets than White Blood Cells".

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