| A | B |
|---|
| cuticle | thin, waxy covering that prevents water loss |
| bundle sheath cells | outer layer of vein that creates circle around xylem and phloem |
| stomata | tiny holes within epidermis where gas exchange occurs |
| epidermis | layer of cells directly underneath the cuticle |
| mesophyll | layer of cells in the "middle of the leaf" |
| guard cells | surround and open/close the stomata |
| phloem | vascular tissue that transports food |
| palisade layer | column-like cells that lie just below the epidermis |
| leaf | primary photosynthetic organ of plant |
| xylem | vascular tissue that transports water |
| spongy layer | loosely packed cells between the palisade layer and lower epidermis |
| petiole | attach leaf to the stem |
| sun | ultimate source of energy for all organisms |
| ATP | main energy molecule for cells |
| chemical bond | site of energy storage in ATP |
