| A | B |
|---|
| vein | bundle of vascular tissue, transports fluids and nutrients |
| cuticle | waxy or fatty watertight layer on outside (external) of epidermal cells |
| stoma | one of many openings in a leaf that enable gas exchange to occur (oxygen & carbon dioxide) |
| guard cell | one of a pair of specialized cells that border stoma and regulate gas exchange |
| spongy mesophyll cells | inside leaf, tissue made up of cells that contain chloroplasts and are surrounded by air spaces |
| lower epidermis | lower skin or barrier to prevent injury to leaf |
| phloem | tissue that carries organic and inorganic nutrients in any direction |
| xylem | type of tissue that provides support and conducts water and nutrients from the roots |
| palisade mesophyll cell | layer of vertically elongated cells that contain cholorplasts located beneath the upper epidermis of leaves, plays a part in photosynthesis |
| upper epidermis | upper layer of leaf, protects leaf |
