The countercurrent system allows for higher blood oxygen saturation by maintaining a constant concentration gradient between water and blood along the entire exchange surface, unlike the parallel system where diffusion stops upon reaching equilibrium.
El sistema a contracorriente permite una mayor saturación de oxígeno en la sangre al mantener un gradiente de concentración constante entre el agua y la sangre a lo largo de toda la superficie de intercambio, a diferencia del sistema paralelo donde la difusión se detiene hasta alcanzar el equilibrio.
| Front | Draw a diagram to show how a much higher oxygen saturation of the blood can be achieved by a countercurrent exchange system as compared to a parallel exchange system |
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| Back | Countercurrent vs parallel:
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