Carbon dioxide cannot diffuse into the blood from an animal cells unless the blood has a blank concentration of carbon dioxide

The blank can be correctly filled with lower.

Diffusion refers to passive movement of molecules or substances from the region of higher concentration to the region of lower concentration.

Thus, if carbon dioxide has to diffuse out of the cell into the blood then, carbon dioxide concentration or partial pressure of carbon dioxide should be lower as compared to that of the cell.

The partial pressure of the carbon dioxide is higher in cells as it produced as byproduct of cellular respiration.

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

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