What is the normal salinity of the blood?

The normal salinity of blood, primarily expressed in terms of sodium chloride concentration, is about 0.9% (or 0.9 grams per 100 milliliters). This concentration is isotonic, meaning it helps maintain proper osmotic balance and cellular function. Blood salinity is crucial for various physiological processes, including fluid balance and nerve transmission. Deviations from this normal range can lead to health issues.