Nigeria, June 15 -- Health depends not only on what is delivered, but also on what is done with the delivery

Every cell in the human body depends on a constant flow like a river. Rivers do not move by accident. Water flows downhill because differences exist, and air moves from regions of higher pressure to lower pressure. In the same way, the circulation depends on pressure gradients, concentration gradients, and continuous biological work. The heart pumps, the lungs exchange gases, and the kidneys regulate fluid and electrolytes. Together, these processes sustain the movement of the body's internal river.

This river delivers oxygen, glucose, fatty acids, amino acids, hormones, minerals, metals, and countless signaling molecules to tis...