Q: Which of the following options does not describe a physical characteristic of blood?  

Answer: A

The volume of blood in an average-sized adult male is not 15-16 liters. In fact, the total volume of blood in an adult male is around 5-6 liters, while in an adult female, it is around 4-5 liters. The pH of blood is slightly alkaline, with a range of 7.35-7.45. Blood constitutes around 20% of the extracellular fluid in the body and provides around 8% of the total body mass. These physical characteristics of blood are important to maintain the proper functioning of the body and to diagnose various disorders related to blood.

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