Scientific facts

Aug 17

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why do we often look like our parents?

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The characteristic of individual human beings are passed from one generation to the next in their chromosomes. Each of our parents gave us 23 chromosomes, making 46 in all. That means that we have two versions of each of our genes, but one is often dominant. We see the effect of the dominant gene, but the other (recessive) gene is still there and can be passed on to our children. DNA-Strand

Chromosomes are thiny threads that are present in all cells apart from the red blood cells. They contain all the information for an entire person to develop. There is a special pair that actually determines a person’s sex short sections of a chromosome are called genes.

Each gene carries the instructions for a specific characteristic, such as an eye colour. many of these genes work with other genes, so it is not easy to say what effects they will have. scientists are currently studying all the genes in a human cell, the study about genes is known as Genetics. which will give them the complete blueprint about human being.

Amazing facts about Genes

The gene for brown eyes is the dominant gene.
Two brown eye genes give brown eyes.
One brown gene and blue gene usually give brown eyes.
Two blue eye genes give blue eyes.

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Jul 28

0

15 Statistical Facts About Human Eye…

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1.The pupil of your eye expands as much as 45% when you look at someone you love.

2. Human corneas are so similar to shark corneas that they have been used as a replacement in human eye surgery.

3. Each eye contains 107 million cells, and all of them are light sensitive.

4. One in every 12 males is colour blind.
kids facts about human eye 5. The human eye only sees three colours: red, blue and green. All other colours are combinations of these.

6.Your eyes are about 2.5 cm across and weight about 8 grams.

7. Only one sixth of the human eyeball is exposed.

8. In an average lifetime, eyes see 24 million different images.

9. While a fingerprint has 40 unique characteristics, an iris has 256. This is why retina scans are increasingly being used for security purposes.

10 People say ’in the blink of an eye’ because it’s the fastest muscle in the body. A blink usually lasts 100 to 150 milliseconds, and it’s possible to blink five times in a second.
amazing facts and interesting facts about human eye 11.The eyes on average blink 17 times per minute, 14,280 times per day, and 5.2 million times per year.

12. Eyes can process about 36,000 bits of information each hour.

13. Brown eyes are actually blue underneath the brown pigment, and as a result there exists a laser procedure to turn brown eyes blue permanently.

14. Your eye will focus on about 50 things per second.

15. The images which our eyes send to our brains are actually sent backwards and upside down.

Jul 28

0

stunning and amazing facts about human heart

Top 10 Amazing facts about Human Heart

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stunning and amazing facts about human heart

Top 10 Amazing facts about Human Heart

01. The heart begins beating at four weeks after conception and does not stop until death.

02. “Atrium” is Latin for “entrance hall,” and “ventricle” is Latin for “little belly.”

03. A newborn baby has about one cup of blood in circulation. An adult human has about four to five quarts which the heart pumps to all the tissues and to and from the lungs in about one minute while beating 75 times.

04. The heart pumps oxygenated blood through the aorta (the largest artery) at about 1 mile (1.6 km) per hour. By the time blood reaches the capillaries, it is moving at around 43 inches (109 cm) per hour.

05. Early Egyptians believed that the heart and other major organs had wills of their own and would move around inside the body.
06. The term “heartfelt” originated from Aristotle’s philosophy that the heart collected sensory input from the peripheral organs through the blood vessels. It was from those perceptions that thought and emotions arose.

07. Prolonged lack of sleep can cause irregular jumping heartbeats called premature ventricular contractions (PVCs).

amazing facts about human heart 08. Cocaine affects the heart’s electrical activity and causes spasm of the arteries, which can lead to a heart attack or stroke, even in healthy people.

09.Galen believed that the heart acted as a low-temperature oven

10.Galen of Pergamum, a prominent surgeon to Roman gladiators, demonstrated that blood, not air, filled arteries, as Hippocrates had concluded. However, he also believed that the heart acted as a low-temperature oven to keep the blood warm and that blood trickled from one side of the heart to the other through tiny holes in the heart.

11. Galen agreed with Aristotle that the heart was the body’s source of heat, a type of “lamp” fueled by blood from the liver and fanned into spirituous flame by air from the lungs. The brain merely served to cool the blood.

12. In 1929, German surgeon Werner Forssmann (1904-1979) examined the inside of his own heart by threading a catheter into his arm vein and pushing it 20 inches and into his heart, inventing cardiac catheterization, a now common procedure.

13.On December 3, 1967, Dr. Christiaan Barnard (1922-2001) of South Africa transplanted a human heart into the body of Louis Washansky. Although the recipient lived only 18 days, it is considered the first successful heart transplant.

STUNNING FACTS ABOUT HUMAN EYES

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Amazing & interesting facts about human eyes 01. Out of all the muscles in your body, the muscles that control your eyes are the most active.

02. The entire length of all the eyelashes shed by a human in their life is over 98 feet with each eye lash having a life span of about 5 months.

03.The Mayans believed that cross-eyes were attractive, and would make efforts to ensure their children became cross-eyed.

Amazing & interesting facts about human eyes 04. Ten thousand years ago, everyone’s eyes were brown until someone developed a genetic mutation that made their eyes blue. This means that if your eyes are blue, you share a common ancestor with every blue-eyed individual in the world!

05.If in a flash photograph you have only one eye that shows up red, it is likely that you have eye cancer (if you are looking directly into the lens). Fortunately, in 95% of cases it’s possible to survive.

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06. A diagnosis of schizophrenia can be made with 98.3% accuracy by doing a simple eye test.

07. Humans and dogs are the only species known to see visual cues from another individual’s eyes, and dogs only do this when interacting with humans.

08. About 2% of women have a rare genetic mutation that provides them with an extra retinal cone in their eyes. This allows them to see 100 million colours!

09. The human eye can only make smooth motions if it’s actually tracking a moving object.

10. Pirates used eye patches to quickly adjust their eyes from above to below deck, having one eye trained for the bright light and the other for dim light, respectively.

11. There are colours that are too complex for the human eye to perceive, called ’Impossible

Amazing & interesting facts about human eyes 12. Your eyes start to develop two weeks after you are conceived.

13. To protect our eyes they are positioned in a hollowed eye socket, while eyebrows prevent sweat dripping into your eyes and eyelashes keep dirt out of your eyes.

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Interesting Facts about Human Eyes

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Amazing & interesting facts about human eyes 01. Your eyeballs stay the same size from birth to death, while your nose and ears continue to grow.

02. An eye is composed of more than 2 million working parts.

03. Only 1/6 of the human eyeball is exposed.

Amazing facts about human eye

04. Corneas are the only tissues that don’t have blood.

05. The human eye weights approximately just under an ounce and is about an inch across.

06. More than 1 million nerve fibers connect each eye to the brain and currently we’re not able to reconstruct those connections.

amazing and interesting facts about juman eye 07. 80% of our memories are determined by what we see.

08. Eyes heal quickly. With proper care, it takes only about 48 hours to repair a minor corneal scratch.

09. There are about 39 million people are blind around the world.

10. 80% of vision problems worldwide are avoidable or even curable.

11. Humans and dogs are the only species known to seek visual cues from another individual’s eyes, and dogs only do this when interacting with humans.

Amazing Facts about human eyes 12. A fingerprint has 40 unique characteristics, but an iris has 256, a reason retina scans are increasingly being used for security purposes.

13. People who are blind can see their dreams if they weren’t born blind.

Amazing & interesting facts about Human eyes 14. “Red eye” occurs in photos because light from the flash bounces off the back of the eye. The choroid is located behind the retina and is rich in blood vessels, which make it appear red on film.15. 80% of what we learn is through our eyes.