Lungs+5-E+class17

OBSERVE: Pull down slowly on the stretched balloon. What happens to the balloon inside the cup? When I stretched it down the small balloon inside filled up in with air. When I stretched it up, the small balloon inside released its air

Push up on the stretched balloon. What happens inside the cup? The small balloon inside releases its air and the balloon has no air in it

EVALUATE: Is there more or less space inside the cup when you pull down on the large balloon? There are more because the stretched balloon acts like a diaphram and lets more air in by relaxing and it even looks like a dome shape to like the diaphram.

IDENTIFY: When you pull the large balloon down, what fills the extra space in the cup? It fills the small balloon with air. The small balloon acts like the lungs, when diaphram his down, the lung fill up. When the large balloon is stretched down, it lets the small balloon fill up.

COMPARE: How is the air pressure in the balloon similar to the air pressure in your lungs? Write down what you think happens when you breathe air into your lungs. It is similar because, when the diaphram or the large balloon relaxes, it always lets air or oxygen into the lungs or small balloon. The straw acts like the trachea and brings air to the small balloon or lungs and brings carbon dioxide or other air back up. Actually, when the diaphragm is relaxed, air is being forced out of the lungs; it's when it "pulls" or contracts, that more space is created inside your body cavity which allows air to enter the lungs since they have more room.

Jesse, you have some well thought out responses and can clearly see how this model of the lung compares to the real lung system (other than your confusion with the diaphragm's relaxed and contracted states.). Good job!