The lungs are made thick black doorbell so purification is changed, remove carbon dioxide and wastes to get gas.Instead, black bloods oxygen becomes a heart arteries already are pumping to various parts of the body.
Lungs are made of thick, black buzzer selected compounds are converted to carbon dioxide. And the waste gas to remove oxygen from the blood is converted into blood. It was heart-pumping supply to parts of the body.
The lungs are thick, purify the blood can make black is change of carbon dioxide. And waste away to get gas.Venous oxygen instead becomes the red blood It was the heart pumps to nourish the parts of the body.