Human body, the physical substance of the human organism. Characteristic of the vertebrate form, the human body has an internal skeleton with a backbone, and, as with the mammalian form, it has hair and mammary glands. Learn more about the composition, form, and physical adaptations of the human body. Keywords are essential to optimize your search engine performances. Include them in the headline as well as in your body content. For a more efficient search, your keywords should be at the beginning of your headline. Think of Twitter. Your content is meant to be shared. So you need to optimize your title lengh to fit the Twitter 140.

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Every WordPress theme has this tag, which defines the overall default content for each page of your website — the site’s body. In the stylesheet ( style.css ), the background for the body is defined like this.

Human body, the physical substance of the human organism, composed of living cells and extracellular materials and organized into tissues, organs, and systems.

Human anatomy and physiology are treated in many different articles. For detailed discussions of specific tissues, organs, and systems, seehuman blood; cardiovascular system; digestive system, human; endocrine system, human; renal system; skin; human muscle system; nervous system; reproductive system, human; respiration, human; sensory reception, human; skeletal system, human. For a description of how the body develops, from conception through old age, seeaging; growth; prenatal development; human development.

For detailed coverage of the body’s biochemical constituents, seeprotein; carbohydrate; lipid; nucleic acid; vitamin; and hormone. For information on the structure and function of the cells that constitute the body, seecell.

Many entries describe the body’s major structures. For example, seeabdominal cavity; adrenal gland; aorta; bone; brain; ear; eye; heart; kidney; large intestine; lung; nose; ovary; pancreas; pituitary gland; small intestine; spinal cord; spleen; stomach; testis; thymus; thyroid gland; tooth; uterus; vertebral column.

Humans are, of course, animals—more particularly, members of the order Primates in the subphylum Vertebrata of the phylum Chordata. Like all chordates, the human animal has a bilaterally symmetrical body that is characterized at some point during its development by a dorsal supporting rod (the notochord), gill slits in the region of the pharynx, and a hollow dorsal nerve cord. Of these features, the first two are present only during the embryonic stage in the human; the notochord is replaced by the vertebral column, and the pharyngeal gill slits are lost completely. The dorsal nerve cord is the spinal cord in humans; it remains throughout life.

Characteristic of the vertebrate form, the human body has an internal skeleton that includes a backbone of vertebrae. Typical of mammalian structure, the human body shows such characteristics as hair, mammary glands, and highly developed sense organs.

Beyond these similarities, however, lie some profound differences. Among the mammals, only humans have a predominantly two-legged (bipedal) posture, a fact that has greatly modified the general mammalian body plan. (Even the kangaroo, which hops on two legs when moving rapidly, walks on four legs and uses its tail as a “third leg” when standing.) Moreover, the human brain, particularly the neocortex, is far and away the most highly developed in the animal kingdom. As intelligent as are many other mammals—such as chimpanzees and dolphins—none have achieved the intellectual status of the human species.

Chemical composition of the body

Chemically, the human body consists mainly of water and of organic compounds—i.e., lipids, proteins, carbohydrates, and nucleic acids. 01.adobe illustratormr. macs virtual existence. Water is found in the extracellular fluids of the body (the blood plasma, the lymph, and 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 fats, phospholipids, and 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 compoundcholesterol 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. So also is collagen, the fibrous, elastic material that makes up much of the body’s skin, bones, tendons, and ligaments. Proteins also perform numerous functional roles in the body. Particularly important are cellular proteins called enzymes, which 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 glycogen, a 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. Deoxyribonucleic acid (DNA) carries the body’s hereditary master code, the instructions according to which each cell operates. It is DNA, passed from parents to offspring, that dictates the inherited characteristics of each individual human. Ribonucleic acid (RNA), of which there are several types, helps carry out the instructions encoded in the DNA.

Along with water and organic compounds, the body’s constituents include various inorganic minerals. Chief among these are calcium, phosphorus, sodium, magnesium, and iron. Calcium and phosphorus, combined as calcium-phosphate crystals, form a large part of the body’s bones. Calcium is also present as ions in the blood and interstitial fluid, as is sodium. Ions of phosphorus, potassium, and magnesium, on the other hand, are abundant within the intercellular fluid. All of these ions play vital roles in the body’s metabolic processes. Iron is present mainly as part of hemoglobin, the oxygen-carrying pigment of the red blood cells. Other mineral constituents of the body, found in minute but necessary concentrations, include cobalt, copper, iodine, manganese, and 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, 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 waste products such 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.

• The human femur can support a weight thirty times that of the human body, making it even stronger than steel.
  
• The evolution of the human eyebrows is believed to have prevented the influx of sweat into the eyes.
  
• Chronic stress produces high levels of cortisol, which may cause damage to the hippocampus in the brain, leading to memory loss.
  
• An increase in the volume of background noise has been correlated with the perception of food as less sweet or less salty.
  
• The human nervous system can relay electrochemical messages at a rate of 249 mph (400 km/hr).
  

Powerful headlines matter as much as your article content and even more! As copyblogger says “eight out of 10 people will read your headline copy, but only two out of 10 will read the rest.” As the first catching sentence of your article, be sure to choose the right words and structure if you want your audience to read your post.

Web writing is meant to be read and shared. And compelling headlines respecting some basic rules have a higher chance to be shared and to increase your social signal value.
This value refers to any link from a user’s social media account to your blog or a share, like or comment. As a matter of fact, Google seems to reward content with a high social signal.
As we already said in our SEO trends article – content is one of the main keys to rule in SEO.

Thus, you need to think in terms of search engine features and people queries. Because you are first talking to real people but also to the ranking criterias.

In this article, you will find several tricks to get catchy and appealing headlines.

1. Use numbers

Numbers have the advantage to organize your article. The visitor knows he will get an easy read point by point. It has the benefit to create a list, and list are very popular.
At the same time, prefer digit numbers instead of writing them, it will be easier to read. Also, avoid to present more than 9 points in your article, researches have shown that a reader get trouble digest more than 9 ideas at a time.

Improve content quality

Finally, if you are choosing the list option, be original in your naming like:

• Reasons
• Principles
• Facts
• Tips
• Advices
• Lessons
• Ideas
• Ways
• Secrets
• Tricks

Example : 5 tools you should use to master Twitter.

2. Use formulas that have proven their efficiency

Some formulas have proven their efficiency over the time and offers a better ROI. Here are some of the best ones. Be careful to not always use the same schema, you could annoyed your readers and totally missed your effect.

• The secret to …

This one works a lot since it gives to the reader the feeling that he is going to get the privileged to learn something important.
Example: The secret to getting more followers.

• How to [specific task] that [rewarding benefit]

The “How to” recipe offers a guidelines step by step and is a useful tool to learn something new more easily. Adding the benefice at the end enhance your headline perception.
Example: How to write an article that appeal readers.

• How to [desired result] without [painful objection]

This one works as the previous one but highlights the contradiction between getting the result you desire even if there is an obstacle in front of you.
Example: How to perform on SEO without any technical knowledge?

• [Do something] like [world-class example] example:

Comparing something to someone well-known good results will bring credibility to your article. You suggest to the reader that he can be as good as this successful person.
Example: Get social engagement like Matt Cutts.

• What you need to know about

This headline is really engaging since it pushes the reader to click on the headline to find out what he has missed about a specific subject.
Example: What you need to know about the “mobile-friendly” Google update.

3. Use keywords to please your SEO

Keywords are essential to optimize your search engine performances. Include them in the headline as well as in your body content. For a more efficient search, your keywords should be at the beginning of your headline.

4. Think of Twitter

Content Seoheadlines Body And Themes Wordpress

Your content is meant to be shared. So you need to optimize your title lengh to fit the Twitter 140 characters. But it will be better if you write only 69 characters. First it is easier for your post retweet because it lets enough space for a link, a mention, a picture or hashtags and shorter headlines are more shared!
Then, search engine display 69 characters before cutting it in the search results, so keep that in mind!

5. Use appealing adjectives

Content Seoheadlines Body And Themes Examples

Using compelling adjectives will bring you more engagement. Prefer positive or powerful ones since it will catch your audience attention in a good way and increase your click-through rate.
Here are some of the best adjectives to use:

Content Seoheadlines Body And Themes Ppt

• Surprising
• Awesome
• Effortless
• Free
• Proven
• Powerful
• Smart
• Essential
• Appealing
• Critical
• Huge/big
• Searing
• …

Content Seoheadlines Body And Themes Powerpoint

To sum up, you really need to concentrate your effort on your headline.
You should write it at the end after you have finished your post or go back to it. You may find that your first headline doesn’t fit anymore to the angle you have given to your article first. So don’t be afraid to tweak it, you will have the necessary hindsight to make the right changes.