why do we need water to stay alive
Humans can live for weeks and sometimes months without food. Going without water, however, is a different storyБ
Two-thirds of the human body (by weight) consists of water. Humans need for circulation, respiration, and converting food to energy. After oxygen, is the body's most important nutrient. Quite simply, you need to live. Your body constantly through sweat, urine, and even breathing. You must replace the your body loses for your organs to continue to work properly. occurs when your body doesn't have enough water, because you're losing more than you're taking in. In heat, an adult can lose almost half-a- of through alone. Without water, can set in within an hour in severe heat. The combination of physical and heat Б without water Б can lead to death in as little as several hours. Surprisingly, it's also easy to become dehydrated in very cold environments. Since cold air cannot hold much moisture, it dehydrates your body with every breath you take. Even even in cold weather. So how long can you without water? Humans in average shape and perfect conditions ( ) can probably live for three to five days without any if they're not physically exerting themselves. Healthier people can live a day or so longer, while those who are unhealthy or exposed to particularly hot or cold weather may not as long. To stay healthy, you need to continually replenish your supply. Experts recommend drinking approximately two quarts (64 ounces or about eight glasses) of each day.
Of course, if you live in an extremely hot or cold area Б or if you exercise a lot Б you may need to drink a or more of every day. If you love animals, you may already know that camels are famous for being able to go long periods of time Б in the desert heat Б without drinking. have been known to six months or more without drinking during the winter. In the extreme of a desert summer, they can still go five to ten days without drinking. So how do they do it? Some people believe it's because they store in the humps on their back, but that's not true. Their humps are filled with fat, which allows them to go a long time without food. Camels can go a long time without drinking because their internal body temperature can vary much more than a human's, which allows them to withstand high temperatures without needing to to cool their bodies. Camels also have specially-shaped elliptical blood cells, which promote blood flow and don't allow blood volume to drop when levels drop. These factors allow them to in desert climates without for days at a time. What do you, the trees, and a hamster have in common? Give up? You all need water. All living things must have water to survive, whether they get it from a water fountain, a rain cloud, or a little bottle attached to the side of a hamster cage. Without water, your body would stop working properly. Water makes up more than half of your body weight, and a person can't survive for more than a few days without it.
Why? Your body has lots of important jobs and it needs water to do many of them. For instance, your, which contains a lot of water, carries oxygen to all the cells of your body. Without oxygen, those tiny cells would die and your body would stop working. Water is also in lymph (say: limf), a fluid that is part of your, which helps you fight off illness. You need water to digest your food and get rid of waste, too. Water is needed for digestive juices, (pee), and poop. And you can bet that water is the main ingredient in perspiration, also called. Besides being an important part of the fluids in your body, water is needed by each cell to function normally. Your body doesn't get water only from drinking water. Any fluid you drink will contain water, but water and milk are the best choices. Lots of foods contain water, too. Fruit contains quite a bit of water, which you could probably tell if you've ever bitten into a peach or plum and felt the juices dripping down your chin! Vegetables, too, contain a lot of water think of slicing into a fat tomato from the garden or crunching into a crisp stalk of celery. How Much Is Enough? Since water is so important, you might wonder if you're drinking enough. There is no magic amount of water that kids need to drink every day. Usually, kids like to drink something with meals and should definitely drink when they are thirsty.
But when it's warm out or you're exercising, you'll need more. Be sure to drink some extra water when you're out in warm weather, especially while playing sports or exercising. When you drink is also important. If you're going to sports practice, a game, or just working out or playing hard, drink water before, during, and after playing. Don't forget your water bottle. You can't play your best when you're thinking about how thirsty you are! When your body doesn't have enough water, that's called being dehydrated. also can keep you from being as fast and as sharp as you'd like to be. A bad case of dehydration can make you sick. So keep that water bottle handy when the weather warms up! Not only does water fight dehydration, but it's awfully refreshing and has no calories. Your body can help you stay hydrated by regulating the amount of water in your system. The body can hold on to water when you don't have enough or get rid of it if you have too much. If your pee has ever been very light yellow, your body might have been getting rid of excess water. When your pee is very dark yellow, it's holding on to water, so it's probably time to drink up. You can help your body by drinking when you're thirsty and drinking extra water when you exercise and when it's warm out. Your body will be able to do all of its wonderful, waterful jobs and you'll feel great!
- Views: 173
why do we feel hot in summer
why do plants need a lot of water
why do plants and animals need water
why does your body temperature increase when you exercise
why do you get hot when you exercise