Fig. 1. Electron micrograph of a gas gland cell cultured on a permeable filter membrane. The cell is columnar and shows a clear polarity with some microvilli at the luminal membranes and extensive membrane foldings in both the lateral and the basal membranes. The cytoplasm contains filamentous mitochondria and a Golgi apparatus. Lamellar bodies are most commonly seen near the luminal membranes. g, Golgi apparatus; lb, lamellar body; m, filamentous mitochondria; mv, microvilli; n, nucleus. Scale bar, 1 µm.
