Tissue (biology) 103915 223524045 2008-07-04T13:06:18Z Da monster under your bed 2040962 Reverted edits by [[Special:Contributions/84.252.228.77|84.252.228.77]] to last version by RyRy (using [[WP:HG|Huggle]]) '''Biological tissue''' is a collection of interconnected [[cell (biology)|cell]]s that perform a similar function within an organism. The study of tissue is known as [[histology]], or, in connection with disease, [[histopathology]]. The classical tools for studying the tissues are the [[wax block]], the [[tissue stain]], and the [[Microscope|optical microscope]], though developments in [[electron microscopy]], [[immunofluorescence]], and frozen sections have all added to the sum of knowledge in the last couple of decades.With these tools, the classical appearances of the tissues can be examined in health and disease, enabling considerable refinement of clinical diagnosis and prognosis. ==Animal tissues== There are four basic types of tissue in the body of all [[animal]]s, including the human body and lower [[multicellular]] organisms such as [[insect]]s. These compose all the organs, structures and other contents. * '''[[Epithelium]]''' - Tissues composed of layers of cells that cover organ surfaces such as surface of the skin and inner lining of digestive tract: the tissues that serve for protection, secretion, and absorption. * '''[[Connective tissue]]''' - As the name suggests, connective tissue holds everything together. Connective tissue is characterized by the separation of the cells by non-living material, which is called [[extracellular matrix]]. [[Osseous tissue|Bone]] and [[blood]] are connective tissues. * '''[[Muscle|Muscle tissue]]''' - Muscle cells are the contractile tissue of the body. Its function is to produce force and cause motion, either locomotion or movement within internal organs. Muscle tissue is separated into three distinct categories: visceral or [[smooth muscle]], which is found in the inner linings of organs; [[skeletal muscle]], which is found attached to bone in order for mobility to take place; and [[cardiac muscle]] which is found in the heart. * '''[[Nervous tissue]]''' - Cells forming the [[brain]], [[spinal cord]] and [[peripheral nervous system]]. == Plant tissues == Examples of tissue in other [[multicellular]] organisms are [[vascular tissue]] in [[plant]]s, such as [[xylem]] and [[phloem]]. Plant tissues are categorized broadly into three tissue systems: the [[epidermis (botany)|epidermis]], the [[ground tissue]], and the [[vascular tissue]]. Together they are often referred to as [[biomass]]. * '''[[epidermis (botany)|Epidermis]]''' - Cells forming the outer surface of the [[leaf|leaves]] and of the young plant body. * '''[[Vascular tissue]]''' - The primary components of vascular tissue are the [[xylem]] and [[phloem]]. These transport fluid and nutrients internally. * '''[[Ground tissue]]''' - Ground tissue is less [[cellular differentiation|differentiated]] than other tissues. Ground tissue manufactures nutrients by [[photosynthesis]] and stores reserve nutrients. == See also == * [[Cellular differentiation]] * [[Tissue microarray]] == References == * Raven, Peter H., Evert, Ray F., & Eichhorn, Susan E. (1986). ''Biology of Plants'' (4th ed.). New York: Worth Publishers. ISBN 0-87901-315-X. {{Biological tissue}} {{Composition}} [[Category:Tissues| ]] [[ar:نسيج حيوي]] [[bg:Тъкан (биология)]] [[ca:Teixit (biologia)]] [[cs:Tkáň]] [[da:Væv]] [[de:Gewebe (Biologie)]] [[et:Kude]] [[es:Tejido (biología)]] [[eo:Histo]] [[fr:Tissu biologique]] [[hr:Tkivo]] [[id:Jaringan]] [[is:Vefur]] [[it:Tessuto (biologia)]] [[he:רקמת תאים]] [[ku:Tevînek]] [[la:Textum (biologia)]] [[lv:Audi]] [[lb:Biologeschen Tissu]] [[lt:Audinys (biologija)]] [[mk:Ткиво]] [[ms:Tisu biologi]] [[nl:Weefsel (biologie)]] [[ja:組織 (生物学)]] [[pl:Tkanka]] [[pt:Tecido]] [[ro:Ţesut]] [[qu:Kawsaykuq tantalli]] [[ru:Ткань (биология)]] [[simple:Tissue (biological)]] [[sl:Tkivo]] [[sr:Ткиво]] [[fi:Kudos]] [[sv:Vävnad]] [[ta:திசு]] [[th:เนื้อเยื่อ]] [[vi:Mô]] [[tr:Doku (biyoloji)]] [[uk:Тканина (біологія)]] [[wa:Texhou]] [[yi:ביאלאגישע טישו]] [[zh:组织 (生物学)]]