The cornea in the eye The alveoli in the lungs The chambers in the heart The salivary glands in the mouth
I gave my students this multiple choice question: Stomata are tiny pores located on the leaves of plants. These pores permit the exchange of gases between air in the environment and plant cells located inside the leaf. Which tissue performs a similar function in vertebrates?

Only one answer is correct among these 4 choices:
- The cornea in the eye
- The alveoli in the lungs
- The chambers in the heart
- The salivary glands in the mouth

Could you tell me which one is correct?

The alveoli in the lungs