65.5k views
3 votes
What substance is removed from the blood in the lungs to be exhaled?

User Nyoka
by
7.9k points

1 Answer

6 votes
Carbon dioxide is a waste byproduct of cellular respiration. Blood that is rich in carbon dioxide then returns to the heart via the veins. From the heart this blood is pumped to the lungs where carbon dioxide passes into the alveoli to be exhaled
User Marco Cutecchia
by
7.7k points