| A | B |
|---|
| parenchyma cell | cell with thin walls that forms tissues within leaves, roots, stems, and fruit of plants |
| collenchyma cell | elongated cells with unevenly thick walls that form a supportive tissue of plants |
| sclerenchyma cell | thick-walled, lignin-rich cells that form a supportive plant tissue |
| dermal tissue | tissue system that covers the outside of plants and animals |
| ground tissue | tissue system that makes up the majority of a plant |
| vascular tissue | supportive and conductive tissue in plants, consisting of xylem and phloem |
| xylem | tissue that transports water and dissolved minerals in vascular plants |
| phloem | tissue that transports sugars in vascular plants |
| cohesion-tension theory | theory that explains how the physical properties of water allow it to move through the xylem of plants |
| transpiration | release of vapor through the pores of the skin or the stomata of plant tissue |
| pressure-flow model | model for predicting how sugars are transported from photosynthetic tissue to the rest of a plant |
| blade | broad part of a leaf where most of the photosynthesis of a plant takes place |
| petiole | stalk that attaches a leaf blade to a stem |
| mesophyll | photosynthetic tissue of a leaf, located between the upper and lower epidermis |
| guard cell | one of a pair of cells that controls the opening and closing of a stoma in plant tissue |
| vascular cylinder | center of a root or stem that contains phloem and xylem |
| root hair | thin hairlike outgrowth of an epidermal cell of a plant root that absorbs water and minerals from the soil |
| root cap | mass of cells that covers and protects the tips of plant roots |
| meristem | undifferentiated plant tissue from which new cells are formed |
| fibrous root | root system made up of many threadlike members of more or less equal length |
| taproot | main root of some plants, usually larger than other roots and growing straight down from a stem |
| primary growth | growth in vascular plants resulting in elongation of the plant body |
| secondary growth | growth in woody plants resulting in wider roots, branches, and stems |
