| A | B |
|---|
| Meristematic Tissue | Plant tissue found in roots and shoots. |
| Apical Meristem | Divide to increase length of stems and roots |
| Epidermal Cell | Dermal Tissue; Outer covering of a plant |
| Cuticle | waxy layer of cells that protect from water loss and injury |
| Trichome | Cellular projection on leaves,helps protect the leaf and gives fuzzy appearance |
| Vessel Element | xylem cells forms part of tube for water movement |
| Sieve Tube Element | phloem cell joins end to end forms continuous sieve tube |
| Companion Cell | phloem cell that surrounds sieve tube element |
| Parenchyma | ground-tissue cell with thin cell wall and large vacuole |
| Collenchyma | ground-tissue, strong flexible cell wall |
| Sclerenchyma | ground-tissue cell with extremely thick,rigid cell wall |
| Taproot | primary root found in some plants that grows longer and thicker than other roots |
| Fibrous Root | branch of roots in which no root grows larger than the rest |
| Root Hair | tiny projection from the outer surface of a root |
| Cortex | spongy layer of ground tissue just inside epidermis of root |
| Endodermis | encloses vascular tissue |
| Vascular Cylinder | central region of a root that includes the vascular tissue |
| Root Cap | tough structure that protects a root as it forces its way through the soil |
| Casparian Strip | waterproof strip that surrounds plant endodermis |
| Node | Point on a stem where a leaf is attached |
| Internode | Region between nodes on a plants stem |
| Bud | contains undeveloped tissue |
| Vascular Bundle | contains xylem and phloem tissue |
| Pith | Parenchyma cells inside the ring of vascular tissue |
| Primary Growth | occurs at the tips or roots and shoots |
| Secondary Growth | stems increase width |
| Vascular Cambium | produces vascular tissue and increases thickness |
| Cork Cambiun | produces outercovering of stems |
| Heartwood | Older xylem near the center of a woody stem |
| Sapwood | surrounds heartwood and is active fluid transport |
| Bark | includes all tissue outside the vascular cambium |
| Blade | thin,flattend section of a plant leaf that collects sunlight |
| Petiole | Thin stalk by which a leaf blade is attached to a stem |
| Mesophyll | Specialized ground tissue that makes up bulk of most leaves; performs photosynthesis |
| Palisade Mesophyll | Layer of tall, column shaped mesophyll cells just under the upper epidermis of a leaf |
| Spongy Mesophyll | loose tissue beneath the palisadelayer of a leaf |
| Stoma | opening on underside of a leaf that allows carbon dioxide and oxygen to diffuse |
| Guard Cell | controls opening and closing of stomata by responding to changes in water pressure |
| Transpiration | loss of water from a plant through its leaves |
| Adhesion | Attraction between unlike molecules |
| Capillary Action | Tendency of water to rise in a thin tube |
| Pressure-Flow Hypothesis | Hypothesis that considers plants in terms of where they produce and use materials from photosynthesis |
