Which percentage represents intravascular water in the body?

The correct percentage representing intravascular water in the body is approximately 5%. This small fraction is an important aspect of total body water distribution because intravascular water refers specifically to the plasma that is contained within the blood vessels. Understanding fluid distribution is crucial for managing hydration and fluid resuscitation in medical practice, especially in combat and emergency situations.

Intravascular fluid plays a vital role in maintaining blood volume, which is essential for proper circulation and oxygen delivery throughout the body. The majority of the body's water is found in the intracellular and interstitial spaces, which comprise a larger portion of total body water. Recognizing this distribution is crucial for combat medics and healthcare providers in making informed decisions regarding treatment, especially in cases of trauma or illness where fluid balance is a critical factor.