Alveoli are small air sacs in our lungs that help us breathe. They play a big role in moving gases in and out of our bodies.
Here's how they work:
Thin Walls: Alveoli have very thin walls, just one cell thick. This makes it easier for gases to pass through.
Surfactant: This is a special substance that helps keep the alveoli open by reducing surface tension. It stops them from collapsing.
When we breathe in, oxygen from the air moves into our blood through the alveoli. At the same time, carbon dioxide moves from the blood into the alveoli, so we can breathe it out.
This process is very important for keeping our bodies balanced and healthy!
Alveoli are small air sacs in our lungs that help us breathe. They play a big role in moving gases in and out of our bodies.
Here's how they work:
Thin Walls: Alveoli have very thin walls, just one cell thick. This makes it easier for gases to pass through.
Surfactant: This is a special substance that helps keep the alveoli open by reducing surface tension. It stops them from collapsing.
When we breathe in, oxygen from the air moves into our blood through the alveoli. At the same time, carbon dioxide moves from the blood into the alveoli, so we can breathe it out.
This process is very important for keeping our bodies balanced and healthy!