Trees are really upside-down lungs: their trunks are equivalent to the trachea, their branches to the right and left main bronchi, and all their branching twigs and leaves to small bronchi and alveoli, or air sacs, where the exchange of oxygen and carbon dioxide takes place.


If You Love This Planet: A Plan to Save the Earth (1992)

Helen Caldicott Quotes

Trees are really upside-down lungs: their trunks are equivalent to the trachea, their branches to the right and left main bronchi, and all their...

Trees are really upside-down lungs: their trunks are equivalent to the trachea, their branches to the right and left main bronchi, and all their...

Trees are really upside-down lungs: their trunks are equivalent to the trachea, their branches to the right and left main bronchi, and all their...

Trees are really upside-down lungs: their trunks are equivalent to the trachea, their branches to the right and left main bronchi, and all their...