INVESTIGATING+HOW+BREATHING+WORKS

OBSERVE: Pull down slowly on the stretched balloon. What happens to the balloon inside the cup?

The balloon inflates when pull on the balloon to cause the air or pressure

Push up on the stretched balloon. What happens inside the cup?

When you stretch on the balloon it deflates Do you mean when you PUSH on the stretched balloon?

EVALUATE: Is there more or less space inside the cup when you pull down on the large balloon?

Less because it inflates thus creating the other balloon to expand and take more room Brandon, repeat this step and think about it again. The small balloon is in the cup no matter what so does it really take up more room?

IDENTIFY: When you pull the large balloon down, what fills the extra space in the cup?

The extra space is the other balloon that is attached to the straw and plain air Again, that balloon was in there the entire time whether you were pulling on the stretched balloon or not.

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.

The air pressure is similar because it has carbon dioxide in the air and releases it out when it done inflating, and i think when you breath air in your lungs the Carbon Dioxide that is toxic is separated with the clean air and the carbon dioxide is breath out to start cycle again and the clean air goes to your muscles and all sorts of stuff and the blood vessels will help you. Brandon, you are relying on your knowledge of the circulatory system and not really thinking about the investigation you just did and how it applies to your lungs. You might want to rethink this and forget for a moment what you've already learned about the relationship between the respiratory system and the circulatory system.