The brain is a complex organ that controls thought, memory, emotion, touch, motor skills, vision, breathing, temperature, hunger and every process that regulates our body. Together, the brain and spinal cord that extends from it make up the central nervous system, or CNS.

Brain

Weighing about 3 pounds in the average adult, the brain is about 60% fat. The remaining 40% is a combination of water, protein, carbohydrates and salts. The brain itself is a not a muscle. It contains blood vessels and nerves, including neurons and glial cells.

Composition 

The brain sends and receives chemical and electrical signals throughout the body. Different signals control different processes, and your brain interprets each. Some make you feel tired, for example, while others make you feel pain.Some messages are kept within the brain, while others are relayed through the spine and across the body’s vast network of nerves to distant extremities. To do this, the central nervous system relies on billions of neurons (nerve cells).

Working Principle 

The brain is an important organ that controls thought, memory, emotion, touch, motor skills, vision, respiration, and every process that regulates your body.

Health

Brain Anatomy and How the Brain Works

1.Your eyes blink around 20 times a minute. That’s over ten million times a year! 2. Your ears never stop growing! 3. Earwax is actually a type of sweat!4. The tongue is covered in about 8,000 taste-buds, each containing up to 100 cells helping you taste your food! 5. You produce about 40,000 litres of spit in your lifetime. Or to put it another way, enough spit to fill around five hundred bathtubs – yuck! 6. The average nose produces about a cupful of nasal mucus every day!

Some Weird Facts

7. You are about 1cm taller in the morning when you first get up than when you go to bed. This is because during the day the soft cartilage between your bones gets squashed and compressed.8. If you walked for 12 hours a day, it would take the average person 690 days to walk around the world.9. The only muscle that never tires is the heart.10. The entire surface of your skin is replaced every month, which put another way means you have about 1,000 different skins in your life! 11. The body has 2.5 million sweat pores. 12. Every minute you shed over 30,000 dead skin cells.

Did you know that 206 bones make up the human skeleton? It’s just one of the many fun facts you’ll find in Operation Ouch!: The HuManual. Here are 16 weird, wacky and sometimes-a-bit-gross facts…

Healthy lifestyle

16 weird and wacky facts on the human body

On the rare occasion that you swallow a razor blade, don’t fret. The human body is more capable than you think. Acids are ranked on a scale from 0 to 14—the lower the pH level, the stronger the acid. Human stomach acid is typically 1.0 to 2.0, meaning that it has an impeccably strong pH. In a study, scientists found that the “thickened back of a single-edged blade” dissolved after two hours of immersion in stomach acid.

The human stomach can dissolve razor blades

Yes, really. A cool thing called total internal reflection&nbsp;is applied when pointing a laser beam through a container of water. When light travels through water, it’s slowed by the heavier particles in water,as described here. Thus, the laser beam effectively gets “trapped” in the water.

A Laser Can Get Trapped In Water

In just one teaspoon of soil, there are more microorganisms than people on the planet, said the U.S. Department of Agriculture. “Millions of species and billions of organisms—bacteria, algae, microscopic insects, earthworms, beetles, ants, mites, fungi and more—represent the greatest concentration of biomass anywhere on the planet.”

Soil is alive and well

Your childhood dreams of floating on a weightless cloud may get rained on with this fact: the average cumulus cloud can weigh up to a million pounds. A million pounds! That’s about as heavy as the world’s largest passenger jet.

A cloud can weigh over a million pounds

The letters J and Q don’t appear anywhere on the periodic table. Go ahead and double check. We’ll wait.

Only Two Letters Don't Appear In The Periodic Table

For one of our strangest science facts, bananas contain potassium, and since potassium decays, that makes them slightly radioactive. But this is one of those fun science facts you don’t need to worry about. You’d need to eat 10,000,000 bananas at once to die of radiation poisoning, Forbes reports.

Bananas Are Radioactive

This fact seems counterintuitive, but it’s called the Mpemba effect, after a Tanzanian student named Erasto Mpemba who told his teacher than a hot mixture of ice cream froze faster than a cold one. Scientists now believe this is because the velocities of water particles have a specific disposition while they’re hot that allows them to freeze more readily. If proven correct, this finding could also have implications in daily life, like cooling down electronic devices.

Hot Water Freezes Faster Than Cold Water

If you spin a ball when you drop it, it will fly through the air as it falls. This is called the Magnus effect, and it makes playing tennis and soccer a whole lot easier.

You Can Make Balls Fly

The genes responsible for the most common type of colourblindness are found on the X chromosome, the National Eye Institute explains. Even if women have the genes on one of their two X chromosomes, a properly functioning gene on the other one makes up for that loss. If men inherit the gene on their only X chromosome, they’ll become colourblind.

Men are more likely to be colourblind than women

About 96 percent of the universe is made up of dark matter and dark energy, which are undetectable to humans. Scientists believe this is because the particles that make up these substances don’t interact with regular matter or light. Even though scientific discoveries are constantly being made about the stars, planets, and other galaxies we can see, it’s impossible to make conclusions about things that are invisible to our eyes.&nbsp;

We have no idea what most of the universe looks like

These strange but fun science facts prove the world really is a marvelous place. Find out what your teachers forgot to mention in class.

Mind-blowing Facts

10 Science Facts You Never Learned in School

It refers to the thousands of chemical reactions that turn what we eat and drink into fuel in every cell of the body. These reactions change in response to our environments and behaviors, and in ways we have little control over.&nbsp;Metabolism is not a single thing that can be calibrated with “metabolism boosters” like chili peppers or coffee, or by following special diets.

Metabolism

<ul><li>Basal metabolism is the energy our body needs to keep our cells working and accounts for 65-80% of most adults' caloric consumption.</li><li>The thermic effect of food is the energy our body uses to process food and accounts for 10% of most adults' caloric consumption.</li><li>Physical activity accounts for 10 - 30 % of most people’s caloric consumption .</li></ul>

How The Body Uses Calories

Not everyone overeats and becomes overweight, and not everyone who becomes overweight or obese develops illnesses like diabetes or heart disease.&nbsp;There was never a special diet, exercise regimen, or supplement that worked universally to control weight. Through trial and error, we have to discover habits and routines we can stick with that help us eat less and move more.&nbsp;

Controlling Your Own Weight 

<ul><li>A caloric deficit leads us to unknowingly compensate by eating more.</li><li>For some, crash dieting can permanently slow their metabolic rate, leading to longer calorie retention.</li><li>Bodies don’t burn more body fat while on a high-fat and low-carb ketogenic diet, compared to a higher-carb diet.</li><li>Many underestimate their calorie intake and blame genetics.</li><li>“Slow metabolism” isn’t a major cause of obesity, and no product will speed your metabolism up in a way that will lead to substantial slimming.</li><li>Lean muscle and fat tissue in the body, age, and genetics, among others, influence the metabolic rate. </li><li>Women tend to burn fewer calories than men.</li></ul>

Research On Metabolism

<ul><li>A diet that universally leads to healthy weight loss.</li><li>Why two people with the same size and body composition have different metabolic rates.</li><li>Why some ethnic groups — African Americans, South Asians — have a higher risk of developing metabolic disorders like diabetes.</li><li>How the brain knows what the body weighs </li><li>The mechanism that controls our metabolic rate.</li></ul>

What Science Doesn’t Know

When scientists offer mice or rats a spread of junk food, they consistently find that only some overeat and puff out into little rodent blimps, while others maintain a normal body size. A similar thing happens in people. In the US, and around the world, we are now overwhelmed with highly palatable, cheap calories.

humanbodyfacts

Brain

Brain Anatomy and How the Brain Works

Some Weird Facts

16 weird and wacky facts on the human body