gills // how fish get oxygen| dataset | gss2022 · General Social Survey 2022 |
| type | categorical |
| role | |
| data file | |
| keywords |
| code | meaning |
|---|---|
1 | they take in water and break it down into hydrogen and oxygen |
2 | using their gills, they take in oxygen that is dissolved in water |
3 | they get their oxygen from the food they eat |
4 | they come to the surface every few minutes to breathe air into their lungs |