If one touches the hair, its tip breaks off, the sharp edge penetrates the skin, and the poisonous secretion is released.
The hydathode structures discharge water—a phenomenon called guttation through openings in margins or tips of leaves.
The water flows through the xylem to its endings in the leaf and then through the intercellular spaces of the hydathode tissue toward the openings in the epidermis.
Some carnivorous plants have glands that produce secretions capable of digesting insects and small animals.
Resin ducts are common in gymnosperms and occur in various tissues of roots, stems, leaves, and reproductive structures.
These consist of thick walled, greatly elongated and much branched ducts containing a milky or yellowish colored juice known as latex.
They originates as minute structures, elongate quickly and by repeated branching ramify in all directions but do not fuse together.
They grow more or less as parallel ducts which by means of branching and frequent anastomoses form a complex network.
Latex vessels are commonly found in many angiosperm families Papaveraceae, Compositae, Euphorbiaceae, Moraceae, etc.