People

Why do people cry?

Both animals and humans can produce tear but the reason for tears can be different in both of them. Tear ducts are present below the upper eyelid which lubricates and protect our eyes from the dust particles. Human eyes produce three types of tears i.e. […]

Why do people blush?

Why do we blush? Scientists are not able to find the definite answer about this but some theories about this are very common. The system that activates our “fight-or-flight” response, embarrassment and blushing is called the sympathetic nervous system. In this system an action in […]

Why do people yawn?

We generally don’t breathe deeply whenever we are tired or not interested in a particular work. That is why the intake of oxygen is less as compared to the normal situation. So yawning enables us to inhale more amount of oxygen in body and exhale […]