Milady Esthetics State Board Practice Test

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What percentage of blood is approximately made up of water?

  1. 50%

  2. 60%

  3. 70%

  4. 80%

The correct answer is: 80%

The percentage of blood that is made up of water is typically around 80%. Blood is a complex fluid primarily composed of plasma, which itself is approximately 90% water. This high water content is crucial for various functions, including the transportation of nutrients, hormones, and waste products throughout the body. The water in blood also plays a significant role in maintaining blood volume and regulating body temperature. Therefore, understanding the composition of blood, particularly the water content, is essential for estheticians when considering how hydration affects skin health and overall bodily functions.

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