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Showing posts with label SCIENCE WORLD. Show all posts
Showing posts with label SCIENCE WORLD. Show all posts

Sunday, March 22, 2015

Amazing Facts about the Human Body

1. A Human baby has over 300 bones (60 more than adults). With the passage of time some bones get dissolved inside and some get joined with others. 
2. At the point when a pregnant lady endures organ harm, (for example, a heart assault), the hatchling sends undeveloped cells to the harmed organ to help repair it. Furthermore ladies who have beforehand been pregnant show neurological insurance against specific infections.
3. With 100,000 miles of veins inside the normal human body, one can circumnavigate Earth more than two times. Same is true for DNA strand in a human body.
4. A human nose can remember about 50,000 different scents/odors. 
5. If the Earth was straight, human eye could detect a lighted candle during the evening from up to 30 miles away. The same reason, why we are able to see brightly lit up moon even at millions of miles away.
6. Humans shed about 600,000 particles of skin every hour. Summing up would be around 18kg of skin shed during whole lifetime. 
7. At about 250 miles per hour, red blood cells complete full body circuit every 60 seconds, quicker than a Formula 1 racecar. 
8. The human cerebrum can read up to 1,000 words every moment. 
9. An average person produces enough saliva in his lifetime to fill 2 swimming pools easily. 
10. A grown-up is comprised of 7,000,000,000,000,000,000,000,000,000 (7 octillion) molecules. For viewpoint, there's a "measly" 300,000,000,000 (300 billion) stars in our system. 
11. Human beings are the best long distance runners on the planet; better than any four-legged creature. Actually, a great many years prior we used to pursue our prey until they ran themselves to death. 
12. A normal human body has enough iron that can make a 3 inch long nail out of it. 
13. In 30 minutes, the human body gives off enough heat to bring a gallon of water to bubbles.
14. Similar to finger prints, every human being also has unique tongue print. 
15. We have the same measure of hairs on our body as a chimpanzee. Most are futile along these lines fine that they are imperceptible. 
16. The particles that make up your human body today are same iotas that framed amid the Big Bang 13.7 billion years prior. 
17. Human bone is as solid as rock. A square of bone the extent of a matchbox could hold nine tons of weight. And is stronger than the steel.
18. In the event that the human mind was a machine, it could perform 38 thousand-trillion operations every second. The world's most compelling supercomputer, Blue gene, can oversee just .002% of that. 
19. The centering muscles in your eyes move around 100,000 times each day. To give your leg muscles the same workout, you'd have to walk 50 miles. 
20. A human brain uses 20% of the total oxygen and blood in the body. Similarly, a human brain consumes one-third of the meal you consumes every time.

Monday, November 12, 2012

FACTS ABOUT HUMAN BODY

Bones :
The largest bones is the femur, or thigh bone which is 20 inches in a six-foot tall man. The smallest bone is the stirrup in the ear, which is one-tenth of an inch. Each had has 27 bones : eight in the wrist, five in the palm, and 14 in the fingers. A newborn baby has 300 bones, some of which fuse to form in the adult.
Blood :
In a child, there are 60,000 miles of blood vessels. An adult has 100,000 miles of blood vessels. The blood circulates through the body 1,000 times a day.
Brain :
A newborn baby has a brain that weights three ounces. The average brain of an adult weighs three pounds. The brains is the "mission control center" of the body, sending our messages at a rate of 240 miles per hour. The left side of the brain controls the right side of the body and the right side of the brain controls the left side of the body.

Cells :
The cells are the body's building blocks. There are about 26 billion cells in an adult.
Eyes :
Each eye weighs 1 1/4 ounces. The eyes are constantly in motion, even during sleep. Tears keep the eyes warm and are continually secreted through 12 ducts in the eye. Tears are normally secreted through two canals near the inner corner of the eyes.
Fluid :
The body is two-thirds water. Blood is 83% water, muscles are 75% water, the brain 74% water, and the bones contain 22% water. In a single day, three pints of saliva are produced in the mouth.
Hair :
Kids have about 75,000 hairs on their heads, which grow about 1/100 of an inch daily. Hairs of different colors grow at different rates. Dark hair grows faster than light-colored hair. No one known why. Each hair on the scalp grows about five inches a year. Eyelashes keep dust out of the eyes. Aneyelash lives about 150 days before it falls out and is replaced.
Muscles :
There are over 650 muscles in the body, form the tiny ones that move the legs. The strongest muscle is the masseter muscle of the jaw. It takes at least 14 muscles to smile. The smallest in the body is located in the middle ear. Fingers have no muscles.
Nails :
Nails are made up of hardened skin called kertain. Nails protect the ends of the fingers and toes. The half-moon at the root of the nail is called the lunule. Nails grow faster in summer than in winter. Fingernails grow fourtimes faster than toenails. Right - handed people's nails grow faster in their right hands. Left-handed people's nails grow faster on their left hand.
Nose :
More than 2,500 gallons of air flow through the average adult's nose in a day. The nose can recognize up to 1,000 different smells. The nose is the air conditioning unit of the body. It cools or warms incoming air. It also filters the dirt and dust in the air.
Skin :
The human body has six pounds of skin which is, on average, 1/20 of an inch thick. The two layers of skin are the epidermins and under it, the dermis. The skin is waterproof, it protects the body and helps to regulate body temperature. A substance called melanin colors the skin the more melanin, the darker the skin. A freckle is a dense concentration of melanin. A new layer of skin replaces the old layer approximately every 27 days, totalling about 1,000 new outer layers of skin a lifetime.
teeth :
Humans have 20 primary Baby teeth and 32 permanent teeth. By age 13 most people have 28 teeth. By age 18 the four "wisdom" teeth have grown in for a total of 32 permanent teeth.

Saturday, August 4, 2012

Genetics

Genetics (from Ancient Greek genetikos, “genitive” and that from genesis, “origin”), a discipline of biology, is the science of genes, heredity, and variation in living organisms. Genetics deals with the molecular structure and function of genes, with gene behavior in the context of a cell or organism (e.g. dominance and epigenetics), with patterns of inheritance from parent to offspring, and with gene distribution, variation and change in populations. Given that genes are universal to living organisms, genetics can be applied to the study of all living systems, from viruses and bacteria, through plants (especially crops) and domestic animals, to humans (as in medical genetics).
The fact that living things inherit traits from their parents has been used since prehistoric times to improve crop plants and animals through selective breeding. However, the modern science of genetics, which seeks to understand the process of inheritance, only began with the work of Gregor Mendel in the mid-19th
century. Although he did not know the physical basis for heredity, Mendel observed that organisms inherit traits via discrete units of inheritance, which are now called genes. Genes correspond to regions within DNA, a molecule composed of a chain of four different types of nucleotides: the sequence of these nucleotides is the genetic information organisms inherit. DNA naturally occurs in a double stranded form, with nucleotides on each strand complementary to each other. Each strand can act as a template for creating a new partner strand.
This is the physical method for making copies of genes that can be inherited. The sequence of nucleotides in a gene is translated by cells to produce a chain of amino acids, creating proteins— the order of amino acids in a protein corresponds to the order of nucleotides in the gene. This relationship between nucleotide sequence and amino acid sequence is known as the genetic code. The amino acids in a protein determine how it folds into a three-dimensional shape; this structure is, in turn, responsible for the protein’s function. Proteins carry out almost all the functions needed for cells to live. A change to the DNA in a gene can change a protein’s amino acids, changing its shape and function: this can have a dramatic effect in the cell and on the organism as a whole. Although genetics plays a large role in the appearance and behavior of organisms, it is the combination of genetics with what an organism experiences that determines the ultimate outcome. For example, while genes play a role in determining an organism’s size, the nutrition and health it experiences after inception also have a large effect.

Carbon Dating

Carbon dating is a radiometric dating method that uses the naturally occurring radioisotope carbon-14 (14C) to estimate the age of carbonbearing materials up to about 58,000 to 62,000 years. Raw, i.e. uncalibrated, radiocarbon ages are usually reported in radiocarbon years “Before Present” (BP), “Present” being defined as 1950. Such raw ages can be calibrated to give calendar dates.
One of the most frequent uses of radiocarbon dating is to estimate the age of organic remains from archaeological sites. When plants fix atmospheric carbon dioxide  into organic material during photosynthesis they incorporate a quantity of 14C that approximately matches the level of this isotope in the atmosphere (a small difference occurs because of isotope fractionation, but this is corrected after laboratory analysis[citation needed]). After plants die or they are consumed by other organisms (for example, by humans or other animals) the 14C fraction of this organic material declines at a fixed exponential rate due to the radioactive decay of 14C. Comparing the remaining 14C fraction of a sample to that expected from atmospheric 14C allows the age of the sample to be estimated.
The technique of radiocarbon dating was developed by Willard Libby and his colleagues at the University of Chicago in 1949. Emilio Segrè asserted in his autobiography that Enrico Fermi suggested the concept to Libby in a seminar at Chicago that year. Libby estimated that the steady state radioactivity concentration of exchangeable carbon-14 would be about 14 disintegrations per minute (dpm) per gram.
In 1960, he was awarded the Nobel Prize in chemistry for this work. He first demonstrated the accuracy of radiocarbon dating by accurately estimating the age of wood from an ancient Egyptian royal barge for which the age was known from historical documents.
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