Read the following passage and make notes: (5) Water is more important to life than food, since mam live without food for several weeks, but can live for only a few days without water. The adult weight is approximately 70% water, the amount varying different parts of the body and in differem tissues. It is distributed as blood, extracellular fluids (Eg. Lymph, cerebrospinal fluid, eye fluid) and cellular fluids, which constitute 3.5%, 20% and 50% of body weight, respectively. The gastrointestinal secretion amounts to about seven litres per day, but most of this is reabsorbed in to the body. The cerchrospinal fluid is also secreted and absorbed daily, but the exact quantity is unknown. Eye fluid are small amount, but there is a definite circulation. Urine is formed continuously and is a fluid lost from the body. Sweat is also lost from the body, the amount varying with climate and work. Oedema, when it occars, is a symptom of some change in water metabolism in the body
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