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Tract
Tract may refer to: Geography and real estate * Housing tract, an area of land that is subdivided into smaller individual lots * Land lot or tract, a section of land * Census tract, a geographic region defined for the purpose of taking a census Writings * Tract (literature), a short written work, usually of a political or religious nature * Tract (liturgy), a component of Roman Catholic liturgy * Treatise Biology * Nerve tract, a bundle of fibers that connects different parts of the central nervous system - analogous to a nerve in the peripheral nervous system * A genetic tract, a sequence of repeating nucleotides or amino acids, such as a polyglutamine tract * A collection of related anatomic structures, such as: ** Gastrointestinal tract ** Genitourinary tract ** Reproductive tract ** A grouping of feathers, e.g. primaries, auricular, scapular Businesses * Tract (imprint), an imprint of the German group VDM Publishing devoted to the reproduction of Wikipedia content See a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastrointestinal Tract
The gastrointestinal tract (GI tract, digestive tract, alimentary canal) is the tract or passageway of the Digestion, digestive system that leads from the mouth to the anus. The tract is the largest of the body's systems, after the cardiovascular system. The GI tract contains all the major organ (biology), organs of the digestive system, in humans and other animals, including the esophagus, stomach, and intestines. Food taken in through the mouth is digestion, digested to extract nutrients and absorb energy, and the waste expelled at the anus as feces. ''Gastrointestinal'' is an adjective meaning of or pertaining to the stomach and intestines. Nephrozoa, Most animals have a "through-gut" or complete digestive tract. Exceptions are more primitive ones: sponges have small pores (ostium (sponges), ostia) throughout their body for digestion and a larger dorsal pore (osculum) for excretion, comb jellies have both a ventral mouth and dorsal anal pores, while cnidarians and acoels have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tract (literature)
A tract is a literary work and, in current usage, usually religious in nature. The notion of what constitutes a tract has changed over time. By the early part of the 21st century, a tract referred to a brief pamphlet used for religious and political purposes. Tracts are often either left for someone to find or handed out. However, there have been times in history when the term implied tome-like works. A ''tractate'', a derivative of a tract, is equivalent in Hebrew literature to a ''chapter'' of the Christian Bible. History The distribution of tracts pre-dates the development of the printing press, with the term being applied by scholars to religious and political works at least as early as the 7th century. They were used to disseminate the teachings of John Wycliffe in the 14th century. As a political tool, they proliferated throughout Europe during the 17th century. They have been printed as persuasive religious material since the invention of Gutenberg's printing press, be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Census Tract
A census tract, census area, census district or meshblock is a geographic region defined for the purpose of taking a census. Sometimes these coincide with the limits of cities, towns or other administrative areas and several tracts commonly exist within a county. In unincorporated areas of the United States these are often arbitrary, except for coinciding with political lines. Census tracts represent the smallest territorial entity for which population data are available in many countries. In the United States, census tracts are subdivided into block groups and census blocks. In Canada, they are divided into dissemination areas. In the U.S., census tracts are "designed to be relatively homogeneous units with respect to population characteristics, economic status, and living conditions" and "average about 4,000 inhabitants". By country Brazil The Brazilian Institute of Geography and Statistics uses the term census sector (''setor censitário''). As of the 2022 Census, there ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nerve Tract
A nerve tract is a bundle of nerve fibers (axons) connecting Nucleus (neuroanatomy), nuclei of the central nervous system. In the peripheral nervous system, this is known as a nerve fascicle, and has associated nervous tissue, connective tissue. The main nerve tracts in the central nervous system are of three types: association fibers, commissural fibers, and projection fibers. A nerve tract may also be referred to as a commissure, decussation, or neural pathway. A commissure connects the two cerebral hemispheres at the same levels, while a decussation connects at different levels (crosses obliquely). Types The nerve fibers in the central nervous system can be categorized into three groups on the basis of their course and connections. Different tracts may also be referred to as ''projections'' or ''radiations'' such as thalamocortical radiations. Association fibers The tracts that connect cortical areas within the same hemisphere are called Association fiber, association tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyglutamine Tract
A polyglutamine tract or polyQ tract is a portion of a protein consisting of a sequence of several glutamine units. A tract typically consists of about 10 to a few hundred such units. A multitude of genes, in various eukaryotic species (including humans), contain a number of repetitions of the nucleotide triplet C A G or C A A. When the gene is translated into a protein, each of these triplets gives rise to a glutamine unit, resulting in a polyglutamine tract. Different alleles of such a gene often have different numbers of triplets since the highly repetitive sequence is prone to contraction and expansion. Several inheritable neurodegenerative disorders, the polyglutamine diseases, occur if a mutation causes a polyglutamine tract in a specific gene to become too long. Important examples of polyglutamine diseases are spinocerebellar ataxia and Huntington's disease. Trinucleotide repeat expansion occurring in a parental germline cell can lead to children that are more affecte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Feathers
Feathers are epidermis (zoology), epidermal growths that form a distinctive outer covering, or plumage, on both Bird, avian (bird) and some non-avian dinosaurs and other archosaurs. They are the most complex integumentary structures found in vertebrates and an example of a complex evolutionary novelty. They are among the characteristics that distinguish the extant Aves, birds from other living groups. Although feathers cover most of the bird's body, they arise only from certain well-defined tracts on the skin. They aid in flight, thermal insulation, and waterproofing. In addition, coloration helps in communication and crypsis, protection. The study of feathers is called plumology (or plumage science). People use feathers in many ways that are practical, cultural, and religious. Feathers are both soft and excellent at trapping heat; thus, they are sometimes used in high-class bedding, especially pillows, blankets, and mattresses. They are also used as filling for winter clothi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tract Housing
Tract housing, sometimes informally known as cookie cutter housing, is a type of housing development in which multiple similar houses are built on a tract (area) of land that is subdivided into smaller lots. Tract housing developments are found in suburb developments that were modeled on the " Levittown" concept and sometimes encompass large areas of dozens of square miles. Design Tract housing came about in the 1940s when the demand for cheap housing skyrocketed. Economies of scale meant that large numbers of identical houses could be built in a "cookie cutter" fashion faster and more cheaply to fulfill the growing demand. Developers would purchase a dozen or more adjacent lots and conduct the building construction as an assembly-line process. Tract housing development makes use of few architectural designs, and labor costs are reduced because workers need to learn the skills and movements of constructing only those designs rather than repeat the learning curve. In addition, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genitourinary Tract
The genitourinary system, or urogenital system, are the sex organs of the reproductive system and the organs of the urinary system. These are grouped together because of their proximity to each other, their common embryological origin and the use of common pathways. Because of this, the systems are sometimes imaged together. In placental mammals (including humans), the male urethra goes through and opens into the penis while the female urethra and vagina empty through the vulva. The term "apparatus urogenitalis" was used in ''Nomina Anatomica'' (under splanchnologia) but is not used in the current ''Terminologia Anatomica''. Development The urinary and reproductive organs are developed from the intermediate mesoderm. The permanent organs of the adult are preceded by a set of structures that are purely embryonic and that, with the exception of the ducts, disappear almost entirely before the end of fetal life. These embryonic structures are on either side: the pronephros, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tract (liturgy)
The tract (Latin: tractus) is part of the proper of the Christian liturgical celebration of the Eucharist, used instead of the Alleluia in Lent or Septuagesima, in a Requiem Mass, and other penitential occasions, when the joyousness of an Alleluia is deemed inappropriate. Tracts are not, however, necessarily sorrowful. The name apparently derives from either the drawn-out style of singing or the continuous structure without a refrain. There is evidence, however, that the earliest performances were sung responsorially, and it is probable that these were dropped at an early stage. In their final form, tracts are a series of psalm verses; rarely a complete psalm, but all the verses are from the same psalm. They are restricted to only two modes, the second and the eighth. The melodies follow centonization In music centonization (from Latin ''cento'' or patchwork) is musical composition via the combination of pre-existing motivic units, typically in reference to Christian lit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Land Lot
In real estate, a land lot or plot of land is a tract or parcel of land owned or meant to be owned by some owner(s). A plot is essentially considered a parcel of real property in some countries or immovable property (meaning practically the same thing) in other countries. Possible owners of a plot can be one or more persons or another legal entity, such as a company, corporation, organization, government, or Trust company, trust. A common form of ownership of a plot is called fee simple in some countries. A small area of land that is empty except for a paved surface or similar improvement, typically all used for the same purpose or in the same state is also often called a plot. Examples are a paved car park or a cultivated garden plot. This article covers plots (more commonly called lots in some countries) as defined parcels of land meant to be owned as units by an owner(s). Like most other types of property, lots or plots owned by private parties are subject to a periodic pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Treatise
A treatise is a Formality, formal and systematic written discourse on some subject concerned with investigating or exposing the main principles of the subject and its conclusions."mwod:treatise, Treatise." Merriam-Webster Online Dictionary. Accessed September 12, 2020. A ''monograph'' is a treatise on a specialized topic. Etymology The word "treatise" has its origins in the early 14th century, derived from the Anglo-French term ''tretiz'', which itself comes from the Old French ''traitis'', meaning "treatise" or "account." This Old French term is rooted in the verb ''traitier'', which means "to deal with" or "to set forth in speech or writing". The etymological lineage can be traced further back to the Latin word ''tractatus'', which is a form of the verb ''tractare'', meaning "to handle," "to manage," or "to deal with". The Latin roots suggest a connotation of engaging with or discussing a subject in depth, which aligns with the modern understanding of a treatise as a formal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reproductive Tract
The reproductive system of an organism, also known as the genital system, is the biological system made up of all the anatomical organs involved in sexual reproduction. Many non-living substances such as fluids, hormones, and pheromones are also important accessories to the reproductive system. Unlike most organ systems, the sexes of differentiated species often have significant differences. These differences allow for a combination of genetic material between two individuals, which allows for the possibility of greater genetic fitness of the offspring.Reproductive System 2001 Body Guide powered by Adam Animals In mammals, the major organs of the reproductive system include the external |
