gills // how fish get oxygen| 数据集 | gss2022 · General Social Survey 2022 |
| 类型 | categorical |
| 角色 | |
| 数据文件 | |
| 关键词 |
| 编码 | 含义 |
|---|---|
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 |