Cortex (botany)

Cross-section of a flax plant stem:
1. Endodermis
2. Protoxylem
3. Xylem I
4. Phloem I
5. Sclerenchyma (bast fibre)
6. Cortex
7. Epidermis

In botany, the cortex is the outer layer of the stem or root of a plant, bounded on the outside by the epidermis and on the inside by the endodermis. It is composed mostly of undifferentiated cells, usually large thin-walled parenchyma cells of the ground tissue system. The outer cortical cells often acquire irregularly thickened cell walls, and are called collenchyma cells. Some of the outer cortical cells may contain chloroplasts. It is responsible for the transportation of materials into the central cylinder of the root through diffusion and may also be used for food storage in the form of starch.

See also

• Bast (biology)

This botany article is a stub. You can help Wikipedia by expanding it.v · Categories: Botany stubs Plant anatomy Plant physiology Wikimedia Foundation. 2010. Игры ⚽ Поможем сделать НИР Davey Pattison Cortex (anatomy) Look at other dictionaries: Cortex — (Latin: bark , rind , shell or husk ) may refer to: Contents 1 Sciences 2 Anatomy 2.1 Organs 2.1.1 The brain 3 …   Wikipedia cortex — [ kɔ:tɛks] noun (plural cortices tɪˌsi:z) 1》 Anatomy the outer layer of an organ or structure, such as a kidney or adrenal gland.     ↘(also cerebral cortex) the outer, folded layer of the cerebrum, which plays an important role in consciousness …   English new terms dictionary cortex — cor·tex || kɔːteks n. (Anatomy) outer layer or region (of the brain, etc.); outer layer of tissue (Botany) …   English contemporary dictionary cortex — /ˈkɔtɛks / (say kawteks) noun (plural cortices /ˈkɔtəsiz/ (say kawtuhseez)) 1. Botany that portion of the stem between the epidermis and the vascular tissue; bark. 2. Zoology, Anatomy a. the rind of an organ, such as the outer wall of the kidney …   Epidermis (botany) — Cross section of a flax plant stem: 1. Pith, 2. Protoxylem, 3. Xylem I, 4. Phloem I, 5. Sclerenchyma (bast fibre), 6. Cortex, 7. Epidermis The epidermis is a single layered group of cells that covers plants …   Wikipedia Thorn (botany) — Thorns are branches or stems that are modified into hard structures with sharp, pointy ends. Though thorns are similar in appearance to spines or prickles, the three structures are differentiated by the plant organ from which they arise: thorns… …   Wikipedia angiosperm — /an jee euh sperrm /, n. Bot. a plant having its seeds enclosed in an ovary; a flowering plant. Cf. gymnosperm. [ANGIO + SPERM] * * * ▪ plant Introduction       any member of the more than 300,000 species of flowering plants (division Anthophyta) …   Universalium Lichen — For other uses, see Lichen (disambiguation). Lichenes from Ernst Haeckel s Artforms of Nature, 1904 …   Wikipedia Lobaria pulmonaria — Lobaria pulmonaria[1][2] Scientific classification …   Wikipedia root — root1 rootlike, adj. /rooht, root/, n. 1. a part of the body of a plant that develops, typically, from the radicle and grows downward into the soil, anchoring the plant and absorbing nutriment and moisture. 2. a similar organ developed from some… …   Universalium 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”