This air output also allows us to blow up balloons or play wind instruments. Air drawn in by expansion of the lungs passes over the olfactory areas of the nose, enabling our sense of smell.

As the rubber sheet is pulled down the volume of the jar increases, the pressure therefore decreases and air is drawn in through the glass tube inflating the balloons, which represent the lungs.

The scientists identified which tissues the stem cells came from, and found cells from the lungs, kidneys and intestines. Previously, mini-organs have been derived from adult stem cells ...