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Depiction of Fleuve de Vie, the "River of Life", from the Book of Revelation, Urgell Beatus, (f°198v-199), c. 10th century. In Christianity the term "water of Life" (Greek: ὕδωρ ζωῆς hydōr zōēs) is used in the context of living water, specific references appearing in the Book of Revelation (21:6 and 22:1), as well as the Gospel of John. [1]
Tears are a clear liquid secreted by the lacrimal glands (tear gland) found in the eyes of all land mammals. [1] Tears are made up of water, electrolytes, proteins, lipids, and mucins that form layers on the surface of eyes. [2] The different types of tears—basal, reflex, and emotional—vary significantly in composition. [2]
A daily intake of water is required for the normal physiological functioning of the human body. The USDA recommends a daily intake of total water: not necessarily by drinking but by consumption of water contained in other beverages and foods. The recommended intake is 3.7 liters (appx. 1 gallon) per day for an adult male, and 2.7 liters (appx ...
Bottled water may not be safer than tap. But many people think it is. In much of the U.S. — and other wealthy nations — tap water is tightly regulated, frequently tested and “often exceeds ...
Every community water supplier is required to send you a Consumer Confidence Report that provides information about your local drinking water quality. (If you can’t find it online and live in an ...
Here, registered dietitians reveal how sparkling water compares to still water in terms of hydration and health value—plus, tell-tale signs that you’re drinking too much fizzy water.
Hydration of fat free tissues, ratio of total body water to fat free body mass, is stable at 0.73 in mammals. [3] In humans, a significant drop in tissue hydration can lead to the medical condition of dehydration. This may result from loss of water itself, loss of electrolytes, or a loss of blood plasma.
A hydrate that has lost water is referred to as an anhydride; the remaining water, if any exists, can only be removed with very strong heating. A substance that does not contain any water is referred to as anhydrous. Some anhydrous compounds are hydrated so easily that they are said to be hygroscopic and are used as drying agents or desiccants.