Plants take in gases through tiny pores called stomata on their leaves and stems.

Here's a breakdown:

* Stomata: These are small openings on the surface of leaves and stems. They are surrounded by two specialized guard cells that can open and close the stomata, regulating the exchange of gases.

* Gas Exchange: When the stomata are open, the plant takes in carbon dioxide (CO2) from the air for photosynthesis and releases oxygen (O2) as a byproduct. They also release water vapor through a process called transpiration.

* Photosynthesis: This is the process by which plants use sunlight, water, and CO2 to produce their own food (sugars) and release oxygen.

So, the stomata are the key players in gas exchange for plants, allowing them to breathe and carry out the crucial process of photosynthesis.