Gaseous exchange takes place in spongy mesophyll
During the day air diffuses into large air spaces of spongy mesophyll through stomata
The carbon iv oxide in the air diffuses into the photosynthesis oxygen is produced
Some of the oxygen diffuses out of the leaf through stomata
During the night air diffuses out of air spaces of spongy mesophyll
The air dissolves into film of moisture
The oxygen in the air diffuses into cells and is used in respiration during which carbon iv oxide is produced
The carbon iv oxide diffuses out of the leaf through stomata due to diffusion/concentration gradient
At night carbon iv oxide accumulates in the leaf since photosynthesis does not take place
Some gaseous exchange also takes place through cuticle
Gaseous exchange occurs through epidermis of young leaves and stems
The cork cells at lenticels are loosely packed
Gaseous exchange takes place between cork and atmosphere within the loosely packed cell
Mohaissack answered the question on October 5, 2017 at 11:44
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