The job description is a critical document for every position. A good job description performs a number of important functions: It describes the skills and competencies that are needed to perform the role; It defines where the job fits within the overall company hierarchy; It is used as the basis for the employment contract; and It is a valuable performance management tool. This article outlines how to write a job description that is clear, concise and accurately defines the role — in 5 simple steps.
As well as believing in the reality of Forms, Plato believed in the immortality of the human soul. The soul was, he thought, an entity that was fundamentally distinct from the body although it could be and often was affected by… Chemical composition of the body Chemically, the human body consists mainly of water and of organic compounds —i.
Water is found in the extracellular fluids of the body the blood plasmathe lymphand the interstitial fluid and within the cells themselves.
It serves as a solvent without which the chemistry of life could not take place. The human body is about 60 percent water by weight. Lipids —chiefly fatsphospholipidsand steroids —are major structural components of the human body.
Fats provide an energy reserve for the body, and fat pads also serve as insulation and shock absorbers. Phospholipids and the steroid compound cholesterol are major components of the membrane that surrounds each cell. Proteins also serve as a major structural component of the body.
Like lipids, proteins are an important constituent of the cell membrane. In addition, such extracellular materials as hair and nails are composed of protein.
Proteins also perform numerous functional roles in the body. Particularly important are cellular proteins called enzymeswhich catalyze the chemical reactions necessary for life. Carbohydrates are present in the human body largely as fuels, either as simple sugars circulating through the bloodstream or as glycogena storage compound found in the liver and the muscles.
Small amounts of carbohydrates also occur in cell membranes, but, in contrast to plants and many invertebrate animals, humans have little structural carbohydrate in their bodies.
Nucleic acids make up the genetic materials of the body. It is DNA, passed from parents to offspring, that dictates the inherited characteristics of each individual human.
Chief among these are calciumphosphorussodiummagnesiumand iron. Calcium is also present as ions in the blood and interstitial fluidas is sodium.
Ions of phosphorus, potassium, and magnesium, on the other handare abundant within the intercellular fluid. Iron is present mainly as part of hemoglobinthe oxygen-carrying pigment of the red blood cells. Other mineral constituents of the body, found in minute but necessary concentrations, include cobaltcopperiodinemanganeseand zinc.
Organization of the body The cell is the basic living unit of the human body—indeed, of all organisms. The human body consists of trillions of cells, each capable of growth, metabolismresponse to stimuli, and, with some exceptions, reproduction.
Although there are some 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: Bone and blood are considered specialized connective tissues, in which the intercellular matrix is, respectively, hard and liquid.
The most basic unit is the cell; groups of similar cells form tissues; groups of different tissues make up organs; groups of organs form organ systems; cells, tissues, organs, and organ systems combine to form a multicellular organism.
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.
Basic form and development In general structure, the human body follows a plan that can be described as a cylinder enclosing two tubes and a rod. This body plan is most clearly evident in the embryo ; by birth, the plan is apparent only in the trunk region—i.
The body wall forms the cylinder.How to Manage People Good managers need to lead, motivate, inspire and encourage people. Follow these tips to learn how to hire, fire, discipline and evaluate employees; and . Here are ten things really smart people do to have a mind that can see the external for the object of beauty and enlightenment that it truly is.
A voice that is trying to make the world seem. No-one wants to have their bike stolen. But here's 6 things we can all do to improve the chances we'll get it back and make replacing it easier if we don't.
[Epistemic status: Pieced together from memory years after the event. I may have mis-remembered some things or gotten them in the wrong order.
Aside from that – and the obvious jokes – this is all true. Free business-day shipping within the U.S. when you order $25 of eligible items sold or fulfilled by Amazon.
Jan 10, · People with disabilities however, have gotten it down to an art form, from enjoying the sun rays to a warm cup of coffee, we know how hard life can be so we know how to embrace the good things.