Chapter 6: Transportation in Animals and Plants

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Transportation in Animals and Plants


What are stomata? Give two functions of stomata.


The tiny pores present on the surface of leaves or stems are called stomata. The exchange of gases CO2 and O2 during photosynthesis and respiration occurs through stomata. Also, transpiration (loss of water in the form of water vapor) occurs through stomata. The stomata pores are surrounded by guard cells. The exchange of gases occurs due to the opening and closing of stomata. Guard cells swell up when it receives water from their surrounding cells. Due to this the stomatal pores open and water is released out. After releasing water, the guard cells shirk, and pores get closed.

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