
Concept explainers
To answer: The factors that are essential for the normal production of red blood cells.
Introduction: Blood is an essential body fluid, which is the primary transport system of the body. It is involved in both pathological and physiological activities of all organs. The red blood cells or erythrocytes are one of the major components of the blood. It is necessary for the transportation of oxygen within the circulatory system. It possesses hemoglobin molecules that efficiently move oxygen from the lungs to other parts of the body.

Explanation of Solution
The factors that are essential for the normal production of red blood cells are as follows:
Dietary sources: Dietary sources such as vitamins (especially folate, riboflavin, B12, B6, ascorbic acid, pantothenic acid, and vitamin E), protein, iron, and minerals.
Intrinsic factors: The intrinsic factors are required for the absorption of vitamin B12 in the ileum.
Erythropoietin: It is required for stimulating the red blood cell production.
Functional bone marrow: The bone marrow should be functional for the production of erythrocytes.
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