Final answer:
The human body is about 50-70% water, which is critical for various physiological functions. Water is involved as a universal solvent in biochemical processes, acts as a lubricant, and is found in varying amounts throughout different organs and tissues.
Step-by-step explanation:
Body Water Content
The human body is composed of approximately 50-70% water, which plays a crucial role in its functioning. This water content varies by organ, with the brain and kidneys having the highest water content at 80-85%, and teeth having the lowest at around 8-10%. Water serves as a lubricant and cushion, but also as an essential medium for biochemical reactions within the body. Water is found both inside cells, known as intracellular fluid, and outside cells, referred to as extracellular fluid. Extracellular fluid further consists of interstitial fluid (IF) and blood plasma. Small amounts of water are also present in other bodily fluids like cerebrospinal fluid (CSF), ocular fluid, lymph, and synovial fluids.
Water's functions go beyond just constituting a significant portion of our body mass. It is involved in numerous biological processes, being the medium for most of the chemical reactions in the cell. Its polarity and ability to form hydrogen bonds make it an excellent solvent and contributor to the body's chemical reactions. Understanding water's role further highlights its importance in maintaining hydration and proper physiological function. Given its widespread presence and function in the body, maintaining an adequate water balance is essential for health.