Urea gets from body cells to the blood plasma by diffusion through the tissue fluid. Explain what this means?

Glucose diffuse from the blood plasma, across the capillary walls to the tissue fluid, and then to the cell.

Glucose diffuse from the blood plasma, across the capillary walls to the tissue fluid, and then to the cell. The waste product urea diffuse from the cells of the liver to the tissue fluid, and then across the capillary walls into the blood plasma.

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.

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