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PART ---TWO

WHY DO MEN HAVE NIPPLES?

Men and women are built from the same template, and these are just a remnant of a man’s early development.

WHAT’S THE POINT OF EYEBROWS?

Read here   part-- one
                part--three



WHAT’S THE POINT OF EYEBROWS?

Biologically, eyebrows can help to keep sweat and rainwater from falling into your eyes. More importantly in humans, they are key aids to non-verbal communication.
WHAT IS A BELLY BUTTON?



WHAT IS A BELLY BUTTON?

The umbilicus is where a baby’s blood flows through to get to the placenta to exchange oxygen and nutrients with the mother’s blood. Once out, the umbilical cord is clamped several centimeters away from the baby and left to fall off. No one quite knows why you’ll get an ‘innie’ or an ‘outie’ – it’s probably all just luck.
WHY IS IT THAT FINGERNAILS GROW MUCH FASTERTHAN TOENAILS?
The longer the bone at the end of a digit the faster the growth rate of the nail. However there are many other influences too nutrition, sun exposure, activity, blood supply – and that’s just to name a few.

WHY DOES MY ARM TINGLE AND FEEL HEAVY IF I FALL ASLEEP ON IT?


WHY DOES MY ARM TINGLE AND FEEL HEAVY IF I FALL ASLEEP ON IT?

This happens because you’re compressing a nerve as you’re lying on your arm. There are several nerves supplying the skin of your arm and three supplying your hand (the radial, median and ulnar nerves), so depending on which part of your arm you lay on, you might tingle in your forearm, hand or fingers.
WHY DO WE ALL HAVE DIFFERENT COLORED HAIR?
Most of it is down to the genes that result from when your parents come together to make you. Some hair colors win out (typically the dark ones) whereas some (e.g. blonde) are less strong in the genetic race.
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IS IT POSSIBLE TO KEEP YOUR EYES OPEN WHEN YOU SNEEZE?



IS IT POSSIBLE TO KEEP YOUR EYES OPEN WHEN YOU SNEEZE?

Your eyes remain shutting as a defense mechanism to prevent the spray and nasal bacteria entering and infecting your eyes. The urban myth that your eyes will pop out if you keep them open is unlikely to happen - but keeping them shut will provide some protection against nasty bugs and viruses.

WHY ARE EVERYONE’S FINGERPRINTS DIFFERENT?


WHY ARE EVERYONE’S FINGERPRINTS DIFFERENT?

Your fingerprints are tine ridges of skin in the tips of your fingers and toe & they are useful for improving the detection of small vibrations and to add friction for better grip. No two fingerprints are the same either on your hands or between two people and that s down to your unique set of genes.

WHY DO WE ONLY REMEMBER SOME DREAMS?
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Dreams have fascinated humans for thousands of years. Some people think they are harmless while others think they are vital to our emotional wellbeing. Most people have four to eight dreams per night which are influenced by stress, anxiety and desire but they remember very few of them. There is research to prove that if you awake from the rapid eye movement (REM) part of your sleep cycle you’re likely to remember your dreams more clearly.

WHY, AS WE GET OLDER, DOES HAIR GROWTH BECOME SO ERRATIC?

Hair follicles in different parts of your body are actually programmed by your genes to do different things, e.g. the follicles on your arm produce hair much slower than those on your head. Men can go bald due to a combination of genes and hormonal change, which may not happen in other areas (e.g. nasal hair).It’s different for everybody!
WHAT GIVES ME MY PERSONALITY?

Researchers have spent their whole lives flying to answer this one. Your personality forms in the front lobes of your brain, and there are clear personality types. Most of It is your environment that is, your upbringing, education, surroundings. However some of it is genetic, although it’s unclear how much. The strongest research In this comes from studying twins what influences one set of twins to grow up and be best friends, yet in another pair, one might become a professor and the other a murderer.
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WHAT MAKES SOME BLOOD
GROUPS INCOMPATIBLE WHILE OTHERS ARE UNIVERSAL?


WHAT MAKES SOME BLOOD  GROUPS INCOMPATIBLE WHILE OTHERS ARE UNIVERSAL?

Your blood type is determined by protein markers known as antigens on the surface of your red blood cells. You can have A antigens. B antigens or none in which case you’re blood type O. However, if you don’t have the antigen, your antibodies ill attack foreign blood. If you re type A and you’re given B, your antibodies attack the B antigens. However, if you’re blood type AB, you can safely receive any type. Those who are blood group O have no antigens so can give blood to anyone, but they have antibodies to A and B so can only receive O back!

A -You have A antigens and B antibodies you can receive blood groups A and O, but can’ receive B.  You can donate to A and AB.
B –You have B antigens and A antibodies. You can receive blood group B and O, but can’t receive A. You can donate to B and AB.
AB -you have A and B antigens and no antibodies. You can receive blood Group A
B AB and O (universal recipient) and can donate to AB.
O-You have no antigens but have A and B antibodies. You can receive blood group O, but can’ receive A, B or AB and can donate to all A. B, AR and O.

Why do some hereditary conditions skip a generation?


Genes work in pairs. Some genes are ‘recessive’ and if paired with a ‘dominant’ half, they won’t shine through. However if two recessive genes combine (one from your mother and one from your father) the recessive trait will show through.

Why do we get itchy?

Itching is caused by the release of a transmitter called histamine from mast cells which circulate in your body. These cells are often released in response to a stimulus, such as a bee sting or an allergic reaction. They lead to inflammation and swelling, and send impulses to the brain via nerves which causes the desire to itch.

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Which muscle produces the most powerful contraction relative to its size?

Which muscle produces the most powerful contraction relative to its size?

The gluteus maximum is the largest muscle and forms the bulk of your buttock. The heart (cardiac muscle) is the hardest-working muscle, as it is constantly beating and clearly can never take a break! However the strongest muscle based on weight is the masseter. This is the muscle that clenches the jaw shut put a finger over the lowest, outer part of your jaw and clench your teeth and you’ll feel it.

Read here   part-- one
                part--three


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