3. YAWNING

*Its main purpose is to cool down the brain after it has been overheated or overloaded.
4. HICCUPING

*The fast eating, overeating or swallowing large pieces of food can irritate our pneumogastric nerve. This is related to our diaphragm andstomach. And the result is a bout of hiccups.
5. TEARS

*It acts as an ‘emotional defense.’ It protects the eye mucuous membrane when foreign objects come into contact with it.
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