your lungs!
alveoli
they help us breathe and get oxygen in our bodies and get carbon dioxide out
Squirrels have lungs to breathe with, just like us.
The main muscle that helps us to breathe is the diaphragm. When it contracts it creates a lower pressure area inside the lungs than is in the outside air, and this basically sucks air into the lungs. The lungs exhale through their own natural recoil.
Squirrels have lungs to breathe with, just like us.
lungs
the respiratory system since that is where your lungs are located
They are structured like they are because the help us to breathe. The reason they have alveoli is because they help us with gas exchange
They enable us to breathe.
The main muscle that helps us to breathe is the diaphragm. When it contracts it creates a lower pressure area inside the lungs than is in the outside air, and this basically sucks air into the lungs. The lungs exhale through their own natural recoil.
Trees are like the lungs of the planet. They breathe in carbon dioxide and breathe out oxygen. Additionally, they provide habitat for birds and other wildlife. But that's not all trees do for us!