Water content in infant –
**Core Concept**
Water content in infants is crucial for their growth and development. The body composition of infants is characterized by a high water content, which is essential for maintaining proper bodily functions, including thermoregulation, digestion, and waste elimination.
**Why the Correct Answer is Right**
Infants have a higher water content compared to adults due to their larger surface area-to-volume ratio, higher metabolic rate, and the need for rapid growth and development. The average water content in infants is around 70-75% of their body weight, with a significant proportion of this water being extracellular. This high water content is necessary to support the rapid growth of cells, tissues, and organs during infancy.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately reflect the water content in infants. While adults have a lower water content, option A does not provide a specific percentage or range.
**Option B:** This option is incorrect because it suggests that the water content in infants is similar to that of adults. However, infants have a higher water content due to their unique physiological characteristics.
**Option C:** This option is incorrect because it implies that the water content in infants is lower than that of adults. However, as mentioned earlier, infants have a higher water content due to their rapid growth and development.
**Clinical Pearl / High-Yield Fact**
It's essential to note that the high water content in infants makes them more susceptible to dehydration and fluid imbalances. Therefore, it's crucial to monitor their fluid intake and output closely, especially in the first few months of life.
**Correct Answer: A. 75%**