Question

WHENEVER WE FEEL DROWSY , SLEEPY OR TIRED WE YAWN .
EXPLAIN.​

Answer 1

Answer:

When we are sleepy or feel drowsy, we yawn because our brain cells lack sufficient amount of oxygen. The deep breath associated with yawning helps us to drawn in more oxygen and supply the much needed oxygen to the tired body organs including the brain..

Answer 2

Answer:

• When we feel drowsy, rate of breathing is decelerated, that means enough oxygen is not supplied to lungs, it makes us yawn. And when we yawn, we get extra oxygen into the lungs that help us in staying awake.