NEETZoologyBody Fluids and Circulation
What is the average number of red blood cells in a healthy adult man?
Options
- A5 millions to 5.5 millions mm⁻³ of blood
- B6 millions to 6.5 millions mm⁻³ of blood
- C4 millions to 4.5 millions mm⁻³ of blood
- D7 millions to 7.5 millions mm⁻³ of blood
Correct answer
A. 5 millions to 5.5 millions mm⁻³ of blood
Step-by-step solution
Erythrocytes or red blood cells (RBC) are the most abundant of all the cells in blood. A healthy adult man has, on an average , 5 million to 5.5 million of RBCs mm–3 of blood . RBCs are formed in the red bone marrow in the adults. RBCs are devoid of nucleus in most of the mammals and are biconcave in shape. They have a red colored, iron containing complex protein called haemoglobin, hence the color and name of these cells. A healthy individual has 12-16 gms of haemoglobin in every 100 ml of blood. These molecules p