2. Plants need Oxygen too.
• Plants obtain the
gases they need
through their leaves.
• They require oxygen
for respiration and
carbon dioxide for
photosynthesis.
http://www.chemsoc.org/networks/LearnNet/cfb/images/12A.jpg
3. The gases diffuse into the
intercellular spaces of the
leaf through pores, which
are normally on the
underside of the leaf –
stomata. From these
spaces they will diffuse
into the cells that require
them.
The Epidermis of a leaf.
9. Lenticels – pores in the bark of
stems
http://sciencecity.oupchina.com.hk/biology/student/glossary/img/l
enticels.jpg
http://www.treedictionary.com/DICT200
3/IMAGES/LENTICELS%20BIRCH.jpg