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NEET BIOLOGYMedium

Arrange the following formed elements in the decreasing order of their abundance in blood in humans: (a) Platelets (b) Neutrophils (c) Erythrocytes (d) Eosinophils (e) Monocytes

A

(c), (a), (b), (e), (d)

B

(c), (b), (a), (e), (d)

C

(d), (e), (b), (a), (c)

D

(a), (c), (b), (d), (e)

Step-by-Step Solution

According to the text, the abundance of formed elements is as follows:

  1. Erythrocytes (RBCs): Most abundant, 5 - 5.5 million mm⁻³ .
  2. Platelets: 1,50,000 - 3,50,000 mm⁻³ (General knowledge, listed as formed elements in text ).
  3. Leucocytes (WBCs): 6000 - 8000 mm⁻³ .

Among WBCs, the order of abundance is:

  • Neutrophils: 60-65% (Most abundant WBC)
  • Monocytes: 6-8%
  • Eosinophils: 2-3%
  • Basophils: 0.5-1% (Least abundant)

Therefore, the decreasing order is: Erythrocytes (c) > Platelets (a) > Neutrophils (b) > Monocytes (e) > Eosinophils (d).

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