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Needs of Living Things
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Simple Machines
States of Matter
The Five Senses
Water Cycle
what is good food made up of

Water, an essential food nutrient

It is possible for a person to survive for many days and weeks without solid food, it is not that easy without water. Water is the most essential requirement of a functioning body.

Water forms about 50-70% of the human body. Think of the wastewater that comes out of our body in the form of urine and sweat. Think of all the blood running through our blood vessels. It is known that the liquid part of blood, called the plasma, is made up of about 90% water. Think about all the digestive juices, moisture on our skin and lubrication of our joints. They are all made possible by water in our bodies.

Water is a very common substance existing freely in nature, although access to it can be difficult in many communities in the world. It is believed that more than 70% of the earth’s surface is made up of water.

fruits and vegetables containing waterOur cells get the needed moisture from the water that we drink. Many fruits such as oranges, watermelon, grapes and apples contain water. Vegetables such as cucumber, tomatoes, and fresh salads contain water too. Digestion of solid foods also result in the release of water in our bodies

The body needs water to regulate its temperatures. It also uses it a medium for blood development. Water is needed for the transport of hormones, nutrients and sugar to all part of the body cells. Water is needed for lubrication of joints. Also importantly, it carries all the by-products of digestion, together with toxic compounds from the body and passes them out in the form of urine.

This is why we constantly need to drink water, to keep our bodies functioning.

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what are the nutrients in a balanced diet