Root System: Plant organ systems that anchors the plant in place, stores excess sugars, and absorbs water and mineral nutrients. That part of the plant below ground level.

 

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Root System: Plant organ systems that anchors the plant in place, stores excess sugars, and absorbs water and mineral nutrients. That part of the plant below ground level.

Tap Root: A primary root that grows vertically downward and gives off small lateral roots; occurs in dicots. Root system in plants characterized by one root longer than the other roots. Example: carrot.

Fibrous Root: A root system found in monocots in which branches develop from the adventitious roots, forming a system in which all roots are about the same size and length.

Adventitious Roots: Roots that develop from the stem following the death of the primary root. Branches from the adventitious roots form a fibrous root system in which all roots are about the same size; occur in . . . View Full Definition

Oregon grape root (Mahonia aquifolium): Antimicrobial, source of berberine which is an antimicrobial for several bacteria (see goldenseal for more on berberine).

Peripheral Nervous System: The division of the nervous system that connects the central nervous system to other parts of the body. Components of the nervous system that transmit messages to the central nervous system.

Photosystems: Clusters of several hundred molecules of chlorophyll in a thylakoid in which photosynthesis takes place. Eukaryotes have two types of photosystems: I and II. The series of green photorecepti . . . View Full Definition

Physical Oceanographic Real Time System (PORTS): A national system of current, water level, and other oceanographical and meteorological sensors telemetering data in real-time to central locations for storage, processing, and dissemination . . . View Full Definition

Operating System (OS): The most important program that runs on a computer. Every general-purpose computer must have an operating system to run other programs. Operating systems perform basic tasks, such as recogni . . . View Full Definition

Organ Systems: Groups of organs that perform related functions.