Plants take up the water that they need from the soil through their roots. Carbon dioxide is a gas found in the air; plants can take in this gas through tiny holes in their leaves. … The leftovers from making the plant food is another gas called oxygen. This oxygen is released from the leaves into the air.

How do plants release oxygen into the air?

Plants use photosynthesis to capture carbon dioxide and then release half of it into the atmosphere through respiration. Plants also release oxygen into the atmosphere through photosynthesis.

What part of the plant releases the oxygen?

Plants absorb CO2 from the surrounding air and release water and oxygen via microscopic pores on their leaves called stomata. Stomata are the gatekeepers of gas exchange between the inside of plants and the external environment.