BLOW HOT BLOW COLD By S AMUTHA SIVARAMAN

BLOW HOT BLOW COLD By S. AMUTHA SIVARAMAN PRT

Why should we blow on hot tea?

Why do we blow hot air to dry cold hair?

State what happens when air is blown into a balloon?

Why do we blow warm air on cold hands? When you warm your hands, you blow steadily with your mouth open. This allows a greater volume of warm air to reach your cold hands we open our mouth wide and exhale that warm air upon our hands.

How human lungs function- breathing process.

The breathing process in humans: inhalation and exhalation When you inhale (breathe in), air enters through the nostrils (the openings to the nose), and flows through the nasal cavity. Inside the nasal cavity, hair, cilia, and mucus trap dust and dirt particles, purifying the air that enters the lungs. when you breathe in is that the diaphragm muscle contracts, which allows your ribcage to move upward and outward. Because the lungs have more room when your chest is expanded, they open up and air rushes in to fill the space. When your lungs fill, the air passes through all the branches of the bronchi into the tiniest air sacs, which are called alveoli. The alveoli are the structures where oxygen and carbon dioxide exchange. When you exhale, the diaphragm muscle relaxes and moves back up. This action causes the ribcage to move downward and inward, minimizing the size of the lungs. This bellows-type movement increases the pressure inside the now-smaller lungs, which forces (or pulls) air up out of the lungs. In the exhaled air is carbon dioxide that was deposited by the red blood cells.