Tree trunks do not have stomata. How do they respire, given that plants lack respiratory organs?

(i) In woody stems, living cells are organized in thin layers beneath the bark.
(ii) Gas exchange occurs through lenticels—small pores in the bark.
(iii)Parenchyma cells are loosely arranged, providing an interconnected network of air spaces for efficient gas diffusion.

Thus, even without stomata or specialized respiratory organs, trees can respire effectively.