Q: What gases move in and out of blood during gas exchange?


Read this paragraph and choose the correct option from the provided answers:

User:helix84/Wikimedia Commons. Gas exchange is the movement of oxygen into the blood and carbon dioxide out of the blood . CC BY 2.5.

 Choices:

- oxygen, carbon monoxide

- nitrogen, carbon dioxide

- oxygen, nitrogen

- oxygen, carbon dioxide


A:
oxygen, carbon dioxide