Polar Cell are part of a three cell movement involving Hadley Cells and Ferrel Cells which show
atmospheric circulationand Surface winds.
Cold dense air descends over the Poles which creates high pressure, this cold air moves along the surface to lower latitudes. At around 60 degrees north and south, this air has been warmed up and rises upwards, creating a zone of low pressure.
Wikimedia Foundation. 2010.
Look at other dictionaries:
polar cells — polar bodies (def. 1) … Medical dictionary
Polar auxin transport — is the regulated transport of the plant hormone, auxin, in plants.It is suggested that it involves the components of the cytoskeleton, plasma membrane, and cell wall. [http://www.plantphys.net/chapter.php?ch=19 Exploring the Cellular Basis of… … Wikipedia
polar body — n a cell that separates from an oocyte during meiosis: a) one containing a nucleus produced in the first meiotic division called also first polar body b) one containing a nucleus produced in the second meiotic division called also second polar… … Medical dictionary
polar cell — polar body or polar cell, Biology. one of the tiny cells that arise by a very unequal meiotic division of the ovum at or near the time of fertilization … Useful english dictionary
Polar body — A polar body is a cell structure found inside an ovum. Both animal and plant ova possess it. Asymmetrical cell division (cytokinesis) leads to the production of polar bodies during oogenesis. To conserve nutrients, the majority of cytoplasm is… … Wikipedia
Polar membrane — In the scientific literature polar membrane has acquired two separate meanings.1) A lipid biomembrane expressing polarity in the electrical sense. Such membranes can be manipulated chemically and their electrical properties can be studied by… … Wikipedia
polar lobe — In some molluscs a polar lobe appears as a clear protrusion close to the vegetal pole of the cell prior to the first cleavage, and becomes associated with only one of the daughter cells. Removal of the first polar lobe, or of any polar lobe that… … Dictionary of molecular biology
polar bodies — 1. small nonfunctional cells with a haploid chromosome complement, consisting of a small amount of cytoplasm and a nucleus, resulting from unequal division of the primary oocyte (first polar b.) and, if fertilization occurs, of the secondary… … Medical dictionary
polar — 1. Relating to a pole. 2. Having poles, said of certain nerve cells having one or more processes. [Mod. L. polaris, fr. polus, pole] * * * po·lar pō lər adj 1) of or relating to one or more poles (as of a spherical body) 2) exhibiting polarity… … Medical dictionary
polar cap — (MESOZOA) The eight anterior cells in the nematogen … Dictionary of invertebrate zoology