What supports the lungs from underneath? — Simple explanation for a 7-year-old

Grammar check

Your sentence "What holds the lungs from underneath?" is understandable, but here are clearer ways to say it:

• "What supports the lungs from underneath?"
• "What holds up the lungs from underneath?"
• "What is under the lungs and supports them?"

Using "supports" or "holds up" sounds a bit more natural than just "holds." "From underneath" is correct and means "under the lungs."

Answer for a 7-year-old

The lungs sit on a big, strong muscle called the diaphragm. The diaphragm is shaped like a dome or a big bowl under your lungs.

1. When you breathe in, the diaphragm moves down and makes more space so the lungs can get bigger and fill with air.
2. When you breathe out, the diaphragm moves up and helps push the air out of the lungs.

Think of the diaphragm like a trampoline under two balloons (your lungs). When the trampoline moves down, the balloons can get bigger. That is how breathing works!