Here's how protists breathe:
* Gas exchange directly through their cell membrane: Since protists are single-celled, they have a large surface area to volume ratio. This allows for efficient diffusion of oxygen and carbon dioxide directly across their cell membrane.
* Diffusion through specialized structures: Some protists have additional structures like contractile vacuoles or flagella that help with gas exchange.
Key points:
* Protists don't have lungs or gills.
* They rely on diffusion for gas exchange, which works well because of their small size.
* Some protists have evolved specialized structures to enhance their gas exchange.
Let me know if you have any other questions!
