Feature The Role of Lungs Expanding: Air Sacs to Endocrine Glands By Science News Magazine Issue: Vol. 108 No. #10, September 6, 1975 Share this:Share Share via email (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Print (Opens in new window) Print Having trouble viewing this? Open in a new window