STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Ivy stem. Coloured scanning electron micrograph (SEM) of the surface of an ivy plant stem. The star- shaped trichomes, a type of modified hair cell, may function in preventing water loss, or in defending the plant against insects. Several stomata are visible, for example in a line from lower left to centre. These pores allow for gaseous exchange between the air and the plant's cells. There are fewer stomata on plant stems than on the leaves.
Model release not required. Property release not required.