Question

what are the functions of arenchyma in a plant?

Answer 1

Oxygen Transport
Provides buoyancy to the plant
Exchange of gases b/w root and shoot ...

Answer 2

Aerenchyma refers to spaces or air channels in the leaves, stems and roots of some plants, which allows exchange of gases between the shoot and the root.They help in interexchange of gases,they allow  the metabolic costs of anaerobic respiration