An exhausted student was attending zoology class . after 30minutes or so he lost interest and he let to go with a tremendous yawn .to his great distress he couldn't close his mouth-his jaws was locked-open -what do you think would have caused it???
Grimmjow:
Ignoring him is the best thing to do varshini. .if you reply him. .he will start a lengthy conversation.
Answers
Answered by
2
Low O2 tension causes yawning.
Similar questions