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ELL Biology Ch 9
Plants at Work
| Term | Definition |
|---|---|
| taproot | one thick root that grows larger than the other roots |
| fibrous roots | many small, thin roots |
| epidermis | a thin outer layer of cells |
| root hair | a tiny hairlike structure on the outer layer of a root |
| cortex | the second layer of a root made of soft, loose tissue |
| root cap | the mass of cells that covers and protects the root tip |
| phloem | a type of tissue in roots, stems, and leaves that carries food from the leaves to other plant parts |
| xylem | a type of tissue in roots, stems, and leaves that carries water up a plant and to the leaves |
| herbaceous stem | a smooth, soft, green stem |
| woody stem | a hard stem that is not green |
| blade | the broad, flat part of a leaf |
| petiole | a stalk that connects the leaf to the plant |
| vein | a part of a leaf that contains transport tissues |
| stoma | a tiny opening in a leaf that allows gases into and out of the leaf |
| guard cells | special cells that open and close the stoma |
| tropism | the growth of a plant in a certain direction in response to a stimulus |
| stem | part of plant which connects the roots to the leaves. |
| annual rings | layers of growth pattern in the cross section of a woody stem |
| leaves | green structures that grown from stems and are the site of photosynthesis |
| nastic response | the response of a plant due to a change in cell pressure |
Created by:
Jesse Wayland
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