Here's my question. When the blood reaches the lungs, it pick up oxygen and gets rid of the waste materials (Blank) and (Blank) Whats the answers for the blanks? Please respond soon! :)
I am not sure if this is what you are asking but here goes, when blood reaches the lungs there is a diffusion of gases. Waste co2 is exhaled while freshly oxygenated blood is circulated around the body.
“And it also sends carbon dioxide from the blood out into the atmosphere. Which is called gas exchange.”
Eventual suffocation, which then leads to death.