|Example Of Capillary Action
Capillary action is a theory which explains why liquids move upwards, and this movement is called capillarity. There are several ways to understand the capillary action in nature. For example, blood travels upwards within our body in the circulatory system. This is one of the classic examples of capillary action, and it is possible because the human body is made up of several capillary tubes in the circulatory system which draw the blood upwards. Then it is purified in the heart and supplied right back to the body.
Even plants depend on capillary action and even they have something called capillaries in their body. They draw water up from the soil with the help of these capillary tubes.
One of the best examples to demonstrate capillary action is a sponge. When you put a piece of sponge on water the water is absorbed into the sponge. For the capillary action to be possible, the circumstances should be adhesive, cohesive and also there should be surface tension. Water is an adhesive substance. The molecules of water stick to each other. However, the capillary action depends on several other factors like the dimensions of the capillary material and the nature of the substance. For example, if you try putting the sponge on a slippery substance like oil, which is also a liquid, the same action may not take place.
The material that is capable of capillary action should be thick in molecular consistency. The tree trunks or plant stems porous in nature and that is why they are able to pull up water.
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