why do we sneeze and yawn?

Answer 1

Yawn: a yawn is caused by the lack of oxygen to your brain telling you to stay awake but sometimes this does not work and you fall asleep Sneeze: a sneeze is considered to go into effect when a partical of some sort or some thing brushing against your nose hair or when light hits your nose hair and warms them up and that trigers your body to deeply inhail and exhail at a very high speed foecing the partical to be blown out of your body

Answer 2

We sneeze to get the dust out of our noses and yawn when we're tired!

Answer 3

We sneeze to get rid of bad stuff up our noses. We yawn because we are tired!! Think it brings more oxygen into our systems

Answer 4

Dust makes you sneeze,lack of oxygen makes you yawn.

Answer 5

Yawning is your body trying to get more oxygen into the system - sneezing is caused by irritation to the nasal passages xxxxxxxx

Answer 6

a sneeze clears your airways ,a yawn gives more oxygen to the brain

Answer 7

thats pretty simple you sneeze if u get mucus or anything stuff in ur nose u sneeze and when ur low on oxyegon or bored or tired you yawn

Answer 8

sneeze clears our noses of dust and stuff and yawn means we are getting tired.

Answer 9

we yawn to take an increased oxygen intake and sneeze to clear our nose from dust and other particles.

Answer 10

we sneeze when dust or something else that doesn't agree with us irritates the nose, we yawn when we are tired to keep blood flowing regularly.