02 concentration is higher outside than inside the lenticels; 02 diffuses into lenticels; then into the cells;
CO2 concentration is higher inside the lenticels than on the outside CO2 diffuses out of the lenticels into the atmosphere;
To provide a large surface area/ make them thin; for gaseous exchange/ to reduce diffussion distance for respiratory gases;
This increases the volume of the buccal cavity while decreasing the pressure; which forces water to rush into the mouth;
adhixbelly answered the question on September 20, 2017 at 09:35
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