| I: | Bulliform cells | large, bubble-shaped epidermal cells that occur in groups on the upper surface of the leaves of many monocots. |
| II: | Lenticels | a porous tissue consisting of cells with large intercellular spaces in the periderm of the secondarily thickened organs and the bark of woody stems and roots of dicotyledonous flowering plants |
| 1. | A - Adaxial epidermis | 2. | B - Phloem |
| 3. | C - Mesophyll | 4. | D - Abaxial epidermis |