Kanepi GymnasiumForm 9

Helena Lattik

HUMAN BODYWhy do people laugh?

Why do people laugh?

• Someone tickled them.• It feels good to laugh.• When they're happy and feeling good.

Laugh

• an emotional release similar to crying.

• brought upon by a mild mental stress rather than an emotional stress.

• It happens when the mind has some notion of an expectation and then that expectation is replaced by something similar but different and unexpected.

• From sudden emotion created by humorous activities performed by others or by themselves.

• Laughter is good for our lungs as an outlet for some extra energy.

• We use 17 different muscles to smile.

• 43 different muscles to frown, so it's easier to smile than frown.

• Laughing also adds days to our lives. However, crying lessens our lives.

• Laughing could also be bad, because you might get bad luck.

• Laughter is part of the universal human vocabulary.

• All members of the human species understand it.

• We’re born with the capacity to laugh.

• One of the remarkable things about laughter is that it occurs unconsciously.

• You don’t decide to do it.

• While we can consciously inhibit it, we don’t consciously produce laughter.

• That’s why it’s very hard to laugh on command or to fake laughter.

Our questions are:

• Why do human yawns? (A-L)• Why do people need to have bones? (A)• Why do people snore? (D)• Why do people laugh? (H)

Why do humans yawn? (A-L)

• Yawning is related to changes in respiration.• Yawning occurs when a person is lethargic,• suffering from boredom• anxiety or fatigue• body is fatigued

Why do people need to have bones? (A)

• the bones are surrounding by the soft tissues• bone, muscle attachment• skeleton with muscles, allowing people to move• bones, and blood is stored in fat

Why do people snore? (D)

• Poor muscle tone in the tongue and throat• Excessive bulkiness of throat tissue• Long soft palate and/or uvula tissue in the back of the mouth• Obstructed nasal airways

Fact about human body:

If you yelled for 8 years, 7 months and 6 days you would have produced enough sound

energy to heat one cup of coffee.

References:http://www.coolquiz.com/trivia/explain/docs/snoring.asp http://www.scientificamerican.com/article.cfm?id=why-do-people-snore http://www.myuniversalfacts.com/2006/04/why-do-people-snore-what-causes.html

http://wiki.answers.com/Q/How_many_bones_are_in_the_human_body Biology textbook

http://www.terviseleht.ee/200012/12_haigutamine.php

http://wiki.answers.com/Q/Why_do_people_laugh http://www.msnbc.msn.com/id/3077386/ns/technology_and_science-science/t/big-mystery-why-do-we-laugh/#.TtiN_mWE76M

Thanks for listening!