Blood plasma is primarily composed of water, making up about 90-92% of its total weight. Since blood plasma is a component of blood, which makes up about 7-8% of body weight in adults, the contribution of blood plasma to total body water can be estimated.
In a simplified calculation, considering that blood accounts for approximately 7-8% of total body weight and plasma constitutes about 90-92% of blood, you can derive that blood plasma accounts for roughly 6-7% of total body weight.
To summarize, blood plasma comprises about 6-7% of body weight when considering its percentage of total body water.
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