Irving

Irving is originally a Scottish surname, a variant of the name Irvine, which is derived from the eponymous River Irvine in Dumfriesshire. It may also refer to:

Persons

Family name

Lexington Avenue

Lexington Avenue, often colloquially abbreviated as "Lex," is an avenue on the East Side of the borough of Manhattan in New York City that carries southbound one-way traffic from East 131st Street to Gramercy Park at East 21st Street. Along its 5.5-mile (8.9-kilometer), 110-block route, Lexington Avenue runs through Harlem, Carnegie Hill, the Upper East Side, Midtown, and Murray Hill to a point of origin that is centered on Gramercy Park. South of Gramercy Park, the axis continues as Irving Place from 20th Street to East 14th Street.

Lexington Avenue was not one of the streets included in the Commissioners' Plan of 1811 street grid, so the addresses for cross streets do not start at an even hundred number, as they do with avenues which were originally part of the plan.

The portion of Lexington Avenue between 14th and 20th Streets is known as Irving Place.

History

Both Lexington Avenue and Irving Place began in 1832 when Samuel Ruggles, a lawyer and real-estate developer, petitioned the New York State Legislature to approve the creation of a new north/south avenue between the existing Third and Fourth Avenues, between 14th and 30th Streets. Ruggles had purchased land in the area, and was developing it as a planned community of townhouses around a private park, which he called Gramercy Park. He was also developing property around the planned Union Square, and wanted the new road to improve the value of these tracts. The legislation approved, and, as the owner of most of the land along the route of the new street, Ruggles was assessed for the majority of its cost. Ruggles named the southern section, below 20th Street, which opened in 1833, after his friend Washington Irving. The northern section, which opened three years later, in 1836, was named after the Battle of Lexington in the Revolutionary War.

Irving, Texas

Irving (/ɜːrvɪŋ/ UR-ving) is a city located in Dallas County in the U.S. state of Texas. According to a 2013 estimate from the United States Census Bureau, the city population was 228,653 making it the thirteenth most populous city in Texas. Irving is part of the Dallas–Fort Worth metroplex.

Irving includes the Las Colinas community, one of the first master-planned developments in the United States and once the largest mixed-use development in the Southwest with a land area of more than 12,000 acres (4,856 ha). Las Colinas is home to the Mustangs at Las Colinas, which is the largest equine sculpture in the world, as well as many Fortune 500 companies, such as ExxonMobil, Kimberly-Clark and Fluor Corporation. In January 2011 the city completed the Irving Convention Center at Las Colinas and continues to develop the area into a mixed-use complex including a special entertainment district.

Part of Dallas/Fort Worth International Airport lies inside the city limits of Irving.

History

Immune system

The immune system is a system of many biological structures and processes within an organism that protects against disease. To function properly, an immune system must detect a wide variety of agents, known as pathogens, from viruses to parasitic worms, and distinguish them from the organism's own healthy tissue. In many species, the immune system can be classified into subsystems, such as the innate immune system versus the adaptive immune system, or humoral immunity versus cell-mediated immunity. In humans, the blood–brain barrier, blood–cerebrospinal fluid barrier, and similar fluid–brain barriers separate the peripheral immune system from the neuroimmune system which protects the brain.

Pathogens can rapidly evolve and adapt, and thereby avoid detection and neutralization by the immune system; however, multiple defense mechanisms have also evolved to recognize and neutralize pathogens. Even simple unicellular organisms such as bacteria possess a rudimentary immune system, in the form of enzymes that protect against bacteriophage infections. Other basic immune mechanisms evolved in ancient eukaryotes and remain in their modern descendants, such as plants and insects. These mechanisms include phagocytosis, antimicrobial peptides called defensins, and the complement system. Jawed vertebrates, including humans, have even more sophisticated defense mechanisms, including the ability to adapt over time to recognize specific pathogens more efficiently. Adaptive (or acquired) immunity creates immunological memory after an initial response to a specific pathogen, leading to an enhanced response to subsequent encounters with that same pathogen. This process of acquired immunity is the basis of vaccination.

Personal trainer

A personal trainer is a fitness professional involved in exercise prescription and instruction. They motivate clients by setting goals and providing feedback and accountability to clients. Trainers also measure their client's strengths and weaknesses with fitness assessments. These fitness assessments may also be performed before and after an exercise program to measure their client's improvements in physical fitness. They may also educate their clients in many other aspects of wellness besides exercise, including general health and nutrition guidelines. Qualified personal trainers recognize their own areas of expertise. If a trainer suspects that one of his or her clients has a medical condition that could prevent the client from safe participation in an exercise program, they must refer the client to the proper health professional for prior clearance.

Purpose of personal training

The scope of practice for a personal trainer is to enhance the components of fitness for the general, healthy population.