How does an oak tree (flowering plant) breathe?

Question

and... How does the four requirements for the respiratory system of an oak tree get fulfilled?
the four requirements are (the cell membrane)
1. Must be thin for diffusion of gases.
2. Must be moist for gases to be dissolved in.
3. Must be near a source of oxygen.
4. Must be closely connected to a transport system.
but i still don't understand. :*(

no, i cant ask my biology teacher this. (he said not to ask)

Answer 1

1. Must be thin for diffusion of gases.
oxygen enters through the holes in the underside of the leaves called.. uhh, oops i forgot what are they called. anyway, the cells there are thin.

2. Must be moist for gases to be dissolved in.
the cells near the 'holes' are moist, so that oxygen will be able to dissolve in the water.

3. Must be near a source of oxygen.
source of oxygen is air of course.

4. Must be closely connected to a transport system.
the oxygen dissolved in the moist cells are passed through the rest of the cells of the tree through cellular osmosis. meaning the oxygen gets around the tree by moving from cell to cell by osmosis.

hope this answers your question.

Answer 2

it uses cellular respiration the oxygen enters the plant through cells then the oxygen enters the roots/circulatory system and gets circulated through the tree