Question

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

(a) Compared to arteries, veins are less numerous and hold less of the body’s blood at any given time 

(b) Blood cells constitute about 70 percent of the total volume of the blood 

(c) White blood cells (WBC) are made by lymph nodes only 

(d) The blood has more platelets than WBC

Answer 1

(d) Blood has more platelets than corpuscles. A microlitre of blood contains 5,000-10,000 of White blood cells (WBC) and 150,000-500,000 platelets.