Answers

2016-06-22T19:17:18+08:00
The human lungs are a pair of large, spongy organs optimized for gas exchange between our blood and the air. Our bodies require oxygen in order to survive. The lungs provide us with that vital oxygen while also removing carbon dioxide before it can reach hazardous levels.

0
2016-06-22T19:17:58+08:00
the lungs are the primary organs of respiration in humans and other animals including some fish and snails
0