In adults, water makes up around 60% of total body weight, and in kids, it makes up about 75%. Water is essential to life and performs numerous vital functions in the body. It lubricates the joints and maintains the tissues in the mouth, eyes, and nose moisturized. Additionally, water safeguards essential tissues and organs and avoids dehydration and constipation. It transports nutrients and oxygen to the cells, as well as dissolving some minerals. Additionally, it is essential for controlling body temperature and supports the liver and kidneys by removing waste items from the body.
How much water the body requires to function correctly depends on a variety of things. The body needs more water when it is hot outside, is active, is sick with diarrhea or vomiting, or has a fever. Age, medical problems, body size and composition, and hydration intake requirements all play a role. The body becomes dehydrated if not given enough water. Dehydration makes it difficult for the body to regulate its temperature, electrolytes become out of balance, joints may become stiff, and blood pressure may rise or fall.
Intracellular fluid (ICF) and extracellular fluid are two types of water in the body (ECF). ICF is the water that exists inside body cells, whereas ECF is the water that exists between tissues and outside of cells. Cells contain roughly two-thirds of the body's total water and one-third of its total salts.
