All organisms consist of monomeric units called cells; some contain a single cell (unicellular) and others contain many units (multicellular). Multicellular organisms are able to specialize cells to perform specific functions. A group of such cells is a tissue, and in animals these occur as four basic types, namely epithelium, nervous tissue, muscle tissue, and connective tissue. Several types of tissue work together in the form of an organ to produce a particular function (such as the pumping of the blood by the heart, or as a barrier to the environment as the skin). This pattern continues to a higher level with several organs functioning as an organ system to allow for reproduction, digestion, etc. Many multicell organisms consist of several organ systems, which coordinate to allow for life.
Read more about this topic: Organism
Other articles related to "structure":
321 kinematic structure is a design method for robotic arms (serial manipulators), invented by Donald L ... robots, such as the PUMA, have a kinematic structure that deviates a little bit from the 321 structure ...
... Since the structure is cubic, as described below, the thermal contraction is isotropic - equal in all directions ... The structure of cubic zirconium tungstate consists of corner-sharing ZrO6 octahedral and WO4 tetrahedral structural units ... the coupled rotation of the polyhedral units that make up the structure, and lead to contraction ...
... In terms of literary structure, Revelation consists of four visions, each involving John “seeing” the plan of God unveiled, with an epilogue that ... In terms of content, the structure of Revelation is built around four successive groups of seven the messages to the seven churches the seven seals the seven ... symbols and phrases of Revelation are organized as a chiastic structure, a literary device used frequently in the Old Testament ...
... The cover of each issue serves as the first panel to the story ... Gibbons said, "The cover of the Watchmen is in the real world and looks quite real, but it's starting to turn into a comic book, a portal to another dimension." The covers were designed as close-ups that focused on a single detail with no human elements present ...
2 ... Loving-kindness living Boaz and Ruth are models of an altruism for which the word "loving-kindness" has been coined (approximately translating Hebrew hesed) ...
Famous quotes containing the word structure:
“The structure was designed by an old sea captain who believed that the world would end in a flood. He built a home in the traditional shape of the Ark, inverted, with the roof forming the hull of the proposed vessel. The builder expected that the deluge would cause the house to topple and then reverse itself, floating away on its roof until it should land on some new Ararat.”
—For the State of New Jersey, U.S. public relief program (1935-1943)
“When a house is tottering to its fall,
The strain lies heaviest on the weakest part,
One tiny crack throughout the structure spreads,
And its own weight soon brings it toppling down.”
—Ovid (Publius Ovidius Naso)
“Why does philosophy use concepts and why does faith use symbols if both try to express the same ultimate? The answer, of course, is that the relation to the ultimate is not the same in each case. The philosophical relation is in principle a detached description of the basic structure in which the ultimate manifests itself. The relation of faith is in principle an involved expression of concern about the meaning of the ultimate for the faithful.”
—Paul Tillich (18861965)