How do the following structures help in respiration in plants?

(a) Lenticels

(b) Stomata

(c) Root hairs

Given below are the ways in which the following structures help in plant respiration:

1. Lenticels — These help the stem to participate in respiration.
2. Stomata — These help the leaves to participate in respiration.
3. Root hairs — These help the roots to participate in respiration.