Respiratory

What is the main function of the respiratory system?

Hint: Think about what happens every time you breathe in and out.

What is the trachea commonly called?

Hint: It carries air from your throat down to your lungs.

The trachea divides into two tubes called what?

Hint: One goes to the left lung and one goes to the right lung.

What are the tiny air sacs at the end of the bronchioles where gas exchange occurs?

Hint: They look like tiny clusters of grapes at the ends of the smallest airways.

What muscle below the lungs contracts to help you breathe in?

Hint: It is a dome-shaped muscle that separates the chest from the abdomen.

What happens to the diaphragm when you inhale?

Hint: Inhaling means air comes IN, so the lungs need more space.

What are the smaller branches of the bronchi called?

Hint: The name sounds like a smaller version of 'bronchi.'

In gas exchange, oxygen passes from the alveoli into what type of blood vessel?

Hint: These are the tiniest blood vessels with walls only one cell thick.

What is the correct order of air flow from the nose to the alveoli?

Hint: Air goes through the throat area first, then the voice box, then the windpipe.

What gas do we exhale that plants use for photosynthesis?

Hint: Its chemical formula is CO2.

What structure in the throat contains the vocal cords and is also called the voice box?

Hint: You can feel it vibrate when you hum.

What flap of tissue prevents food from entering the trachea when you swallow?

Hint: It acts like a trapdoor that covers the windpipe opening.