Which of the following are physical characteristics of blood?

Blood indeed has several physical characteristics that can be accurately described. One correct answer highlights that blood has a slightly alkaline pH, typically around 7.35 to 7.45, which means it is on the alkaline side of the pH scale. This slight alkalinity is crucial for various physiological processes, including enzyme function and oxygen delivery.

The volume of blood in an average adult ranges approximately between 5 to 6 liters, which is approximately 7-8% of total body weight. This value is important for maintaining circulation, transporting oxygen and nutrients, and regulating body temperature.

Understanding these physical properties is vital for comprehending blood's role in the body, particularly how it interacts with various systems and serves as a medium for transportation and homeostasis. Factors such as pH and volume are key indicators of health, as imbalances in these aspects can lead to medical conditions.

In contrast, other options do not accurately reflect the known characteristics of blood. For instance, blood is generally red due to the presence of hemoglobin and not blue or green, and it has a viscosity that is higher than water but does not align with descriptions of thin consistency or being high in acidity. These distinctions help clarify why the slightly alkaline pH and normal