Saturday, February 25, 2017

Why are your feet so important?

Why are your feet so important?

Have you ever thought about the important role your feet play in your daily life? On face value, your feet touch the ground whenever you’re standing, walking or running, and they are extensions of the legs, which help move you. But your feet are much more than that. After all, they are the foundation of your body, which means keeping your feet healthy can help keep you healthy.
It Starts With Your Feet: The Gait Cycle
When we walk or run, our body goes through a complex set of steps that makes movement seem smooth and easy. It’s actually a complex cycle called the “gait” or walking cycle. (Keep in mind that a cycle starts in one place and eventually ends at that same point.) To understand the gait cycle, start with your right heel on the ground in front of you with the rest or your foot in the air. When your heel first hits the ground, it is called “heel strike.” Next, your foot starts to flatten on the ground as it takes on more weight. We call this “mid-stance.” Then the ball of your foot and the toes finally touch down on the ground, just as the heel begins to lift. As the momentum of your body continues to carry you forward, your toes come off the ground and the whole foot/leg gets ready to swing forward.

So, when you walk, one leg is always swinging forward, while the other is bearing the weight of the body. Obviously, the slower you move (e.g., walking), the more likely both feet will be supporting your body weight. The faster you move (e.g., running), the more likely one foot will be supporting body weight at any given time.

Friday, February 17, 2017

What Is Media Player?

Media Player most commonly refers to Windows Media Player, a software program included with Windows operating systems that acts as the default video and audio player; more broadly, a media player can refer to any software program that plays media files.

Usage

  • Windows Media Player is relatively simple to use; attempting to open media files will automatically cause Media Player to launch and open the file.

Functions

  • In addition to playing video and audio files, Media Player can play CDs and DVDs and can even burn music onto CDs.

Compatibility

  • Windows Media Player can open most standard media files such as .avi, .mpeg, .wmv and .mp3; files that do not work in the player may work by downloading special instructions called codecs.

Radio

  • More recent versions of Media Player allow the user to connect and listen to Internet radio stations through the Media Player interface.

Rivals

  • Rival media player programs to Windows Media Player include Apple Quicktime, Winamp and RealPlayer. Users often prefer certain players for their user interface rather than for their ability to play files.

Friday, February 10, 2017

Organization Of The Body

The cell is the basic living unit of the human body—indeed, of all organisms. The human body consists of more than 75 trillion cells, each capable of growth, metabolism, response to stimuli, and, with some exceptions, reproduction. Although there are some 200 different types of cells in the body, these can be grouped into four basic classes. These four basic cell types, together with their extracellular materials, form the fundamental tissues of the human body: (1) epithelial tissues, which cover the body’s surface and line the internal organs, body cavities, and passageways; (2) muscle tissues, which are capable of contraction and form the body’s musculature; (3) nerve tissues, which conduct electrical impulses and make up the nervous system; and (4) connective tissues, which are composed of widely spaced cells and large amounts of intercellular matrix and which bind together various body structures. (Bone and blood are considered specialized connective tissues, in which the intercellular matrix is, respectively, hard and liquid.)
The next level of organization in the body is that of the organ. An organ is a group of tissues that constitutes a distinct structural and functional unit. Thus, the heart is an organ composed of all four tissues, whose function is to pump blood throughout the body. Of course, the heart does not function in isolation; it is part of a system composed of blood and blood vessels as well. The highest level of body organization, then, is that of the organ system.


The body includes nine major organ systems, each composed of various organs and tissues that work together as a functional unit. The chief constituents and prime functions of each system are summarized below. (1) The integumentary system, composed of the skin and associated structures, protects the body from invasion by harmful microorganisms and chemicals; it also prevents water loss from the body. (2) The musculoskeletal system (also referred to separately as the muscle system and the skeletal system), composed of the skeletal muscles and bones (with about 206 of the latter in adults), moves the body and protectively houses its internal organs. (3) The respiratory system, composed of the breathing passages, lungs, and muscles of respiration, obtains from the air the oxygen necessary for cellular metabolism; it also returns to the air the carbon dioxide that forms as a waste product of such metabolism. (4) The circulatory system, composed of the heart, blood, and blood vessels, circulates a transport fluid throughout the body, providing the cells with a steady supply of oxygen and nutrients and carrying away such waste products as carbon dioxide and toxic nitrogen compounds. (5) The digestive system, composed of the mouth, esophagus, stomach, and intestines, breaks down food into usable substances (nutrients), which are then absorbed from the blood or lymph; this system also eliminates the unusable or excess portion of the food as fecal matter. (6) The excretory system, composed of the kidneys, ureters, urinary bladder, and urethra, removes toxic nitrogen compounds and other wastes from the blood. (7) The nervous system, composed of the sensory organs, brain, spinal cord, and nerves, transmits, integrates, and analyzes sensory information and carries impulses to effect the appropriate muscular or glandular responses. (8) The endocrine system, composed of the hormone-secreting glands and tissues, provides a chemical communications network for coordinating various body processes. (9) The reproductive system, composed of the male or female sex organs, enables reproduction and thereby ensures the continuation of the species.

Thursday, February 9, 2017

Firefox is a Web browser that is smaller

Firefox includes most of the features with which users of other browsers are familiar. The first iteration of the browser also included several new features other browsers did not have at the time, such as a bookmarks toolbar and tabbed browsing that allow a user to quickly switch back and forth between several Web sites. Other browsers have since adopted many of these features, though Firefox's substantial developer base continues to create new plug-ins that offer increased usability and functionality. Because scripting controls such as Java and ActiveX can easily be unselected during installation, there is the possibility of better security.
Firefox 2.0 was released in October of 2006. The latest version incorporates:
  • A mail component called "Thunderbird"
  • A quick link to the Google search engine
  • The ability to search multiple search engines simultaneously
  • A more streamlined user interface
  • Improved and extended tabbed browsing
  • RSS feed support
  • New security features, including anti-phishing protection
  • Improved integrated search of multiple search engines
  • Spell checking, session restore and "live titles."

Wednesday, February 8, 2017

what is animals.

Animals are multicellular, eukaryotic organisms of the kingdom Animalia or Metazoa. Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their life. Most animals are motile, meaning they can move spontaneously and independently.


 All animals must ingest other organisms or their products for sustenance. Most known animal phyla appeared in the fossil record as marine species during the Cambrian explosion, about 542 million years ago. Animals are divided into various sub-groups, including birds, mammals, amphib


Animal


an′im-al, n. an organised being, having life, sensation, and voluntary motion—it is distinguished from a plant, which is organised and has life, but not sensation or voluntary motion: the name sometimes implies the absence of the higher faculties peculiar to man.—adj. of or belonging to animals: sensual.—n. Animalisā′tion, the act of converting into animal substance, or of endowing with animal attributes: brutalisation.—v.t. An′imalise, to endow with animal life: to convert into animal matter:—pr.p. an′imalīsing; pa.p.an′imalīsed.


n. An′imalism, the state of being actuated by animal appetites only: the exercise or enjoyment of animal life, as distinct from intellectual: brutishness: sensuality: (rare) a mere animal being.—adv. An′imally, physically merely.—Animal spirits, nervous force: exuberance of health and life: cheerful buoyancy of temper: (Milton) the spirit or principle of volition and sensation. [L.—anima, air, life, Gr. anemos, wind—, aēmi, Sans. an, to breathe, to blow.]ians, reptiles, fish and insects.

Monday, February 6, 2017

what is woman

n., pl. wom•en (ˈwɪm ɪn) 
adj. n.

1. an adult female person, as distinguished from a girl or a man.
2. wife.
3. female lover or sweetheart.
4. female servant or attendant.
a5. women collectively; womankind.
6. the nature, characteristics, or feelings often attributed to women; womanliness.
adj.
7. female: woman plumber.
[before 900; Middle English womman, wimman, Old English wīfman=wīf female + man human being; see wifeman]
wom′an•less, adj.
syn: woman, female, lady are nouns referring to adult human beings who are biologically female, that is, capable ofbearing offspring. woman is the general, neutral term: wealthy woman. In scientific, statistical, and other objectiveuse female is the neutral contrastive term to male104 females to every 100 males. female is sometimes useddisparagingly: gossipy female. lady in the sense “polite, refined woman” is a term of approval: We know you willalways behave like a lady.
usage: Although formerly woman was sometimes regarded as demeaning and lady was the term of courtesy,woman is the designation preferred by most modern female adults: League of Women Voters; American Associationof University Women. woman is the standard parallel to manWhen modifying a plural noun, womanlike man,becomes plural: women athletes; women students. The use of lady as a term of courtesy has diminished somewhatin recent years, although it still survives in a few set phrases (ladies' room; Ladies' Day). lady is also used, butdecreasingly, as a term of reference for women engaged in occupations considered by some to be menial or routine:cleaning lady; saleslady. See also girl, lady.

-woman

combining form of womanchairwoman; forewoman; spokeswoman.

usage: Compounds ending in -woman commonly correspond to the masculine compounds in -mancouncilman,councilwoman; congressman, congresswoman. The current practice, esp. in edited written English, is to avoid the -man form in reference to a woman or the plural -men when members of both sexes are involved. Often, a sex-neutralterm is used; for example, council member rather than either councilman or councilwoman; representatives orlegislators rather than congressmen. See also -man, -person.

Saturday, January 7, 2017

what is Yahoo

Yahoo! is an Internet portal that incorporates a search engine and a directory of World Wide Web sites organized in a hierarchy of topic categories. As a directory, it provides both new and seasoned Web users the reassurance of a structured view of hundreds of thousands of Web sites and millions of Web pages. It also provides one of the best ways to search the Web for a given topic. Since Yahoo is associated with the most popular Web search sites, if a search argument doesn't lead to a Yahoo topic page, it will still lead to results from the six or seven popular search engine sites Yahoo links to.
Yahoo! began as the bookmark lists of two Stanford University graduate students, David Filo and Jerry Yang. After putting their combined bookmark lists organized by categories on a college site, the list began to grow into an Internet phenomenon. It became the first such directory with a large following. Filo and Yang postponed their graduate work and became part of a public offering for a multimillion dollar corporation. As of October, 2005, Yahoo was serving approximately 3.4 billion page views worldwide.
According to the site's official FAQ (frequently asked questions) list, Yahoo stands for "Yet Another Hierarchical Officious Oracle.