There’s more to your body than meets the eye! From its intricate organs to your heart beating over 100,000 times a day, the human body contains plenty of incredible details that may surprise you.
Are you curious to discover mind-boggling human body facts? YouTube science channel AsapSCIENCE has got your back. Continue reading to uncover 18 fascinating details about the human body!
1. The human eye can see 100 times more colors than a normal human eye.
Amaze your friends and family with these fascinating facts about the human body! They’ll be so impressed, you may even win their next family trivia game!
On average, humans are capable of seeing around one million colors, though some individuals can see much more! This difference may be down to genetics; certain people possessing genes which allow them to perceive even more shades than average. Our eyes contain three types of cones which detect red, green, and blue wavelengths of light – these three color receptors allow us to perceive an estimated one million different shades. Some individuals possessing four cone types allow them to perceive even more hues – this phenomenon is known as Tetrachromacy.
To see more colors, our eyes contain photoreceptor cells called photoreceptors that utilize two proteins called rhodopsin and photopsin that help absorb light passing through our eyes and pass it along to our brain where it can be perceived as color signals. The most specialized cells can be found near the center of our retina called central fovea, where high density cone cells provide sharp details, color, and contrast vision.
Eyes consist mostly of rod cells which are only capable of sensing low-level brightnesses and hues; as a result, some people experience difficulty seeing in dim or dimly-lit conditions.
One surprising fact about human eyes is that they do not need blood circulation to function; rather, only oxygen can fuel their functioning; even if light enters through plastic wrap covering it completely while still functioning!
Another fascinating fact about the human body is that it contains 206 bones that comprise its skeleton. Each bone has a distinct shape and is covered in living tissue to aid its functionality, while at the same time constantly renewing itself with new bone material.
2. The human tongue is the strongest muscle in the body.
Engage friends and family with fascinating facts about the human body! Packed with computer-generated images, this book covers various fascinating topics related to skeletal, circulatory and muscular systems through an easy-to-read question-and-answer format designed to keep children interested.
It is true that the tongue is an impressive muscle. It can flex and extend, push back hard on the roof of the mouth, speak clearly and suck food all at the same time; and swallow all our food effectively. Furthermore, this muscle contains eight different muscles with various roles; its tip has thousands of taste buds covering its surface making it extremely sensitive to touch.
Muscles come in three varieties: skeletal, which connect to bones and help move them; smooth, found within organs; and cardiac, which pump blood throughout our bodies. Skeletal and smooth muscle both exert force against other muscle tissue with force; but only the heart works continuously over a lifetime – it is by far the strongest!
The bicep is often thought of as the strongest muscle in your body, yet its raw strength doesn’t quite compare to that of your heart. Additionally, masseter muscles – found within your jawbone – may offer stiff competition with them being capable of exerting up to 200 pound force upon teeth when chewing.
Bones are composed of calcium, phosphorus, sodium and collagen. Every seven years new bone tissue replaces old tissue; this constant remodeling keeps bones strong while providing them with flexibility.
Human bodies are truly amazing things – yet there’s so much more to discover. Readers of DK’s It Can’t Be True! series will enjoy discovering fascinating facts about bones, digestive systems and brains – it makes an excellent present for curious kids as well as adults! This stunning book from its It Can’t Be True! series makes an excellent way to introduce and educate youngsters about all the ways our bodies function!
3. The human heart beats 3 billion times a day.
The human heart is an exquisitely tuned organ that works continuously to provide oxygen-rich blood to our organs and tissues, transport away waste products, reoxygenate it for circulation back to other parts of the body, and reoxygenate blood back out into circulation again. A muscular organ about the size of your closed fist resting comfortably at the center of our chests with its leftward tilt is our heart’s primary mechanism for doing its work.
The heart has its own electrical system and does not rely on brain signals to beat, meaning it can continue beating even after consciousness has faded or the organ has been removed from its host body. Furthermore, oxygen-deprived environments make faking a beating heart extremely challenging to achieve.
A heartbeat can be heard as a series of “whooshing” sounds produced by the opening and closing of heart valves. These sounds result from turbulent bloodflow as it passes between muscular walls of the heart.
Blood provides oxygen and nutrients to all parts of your body while carrying away waste products and carbon dioxide. As a clear fluid composed of red blood cells, platelets, white blood cells and iron ions, copper, zinc manganese chromium as well as trace amounts of gold; all produced in bone marrow for transport through blood vessels throughout your body.
There are 206 bones in a human body, which make up its skeleton and provide structure and support. Babies at birth typically have approximately 300 bones; as they develop, some fuse together. Every minute, you shed approximately 30,000 dead skin cells that are replaced by new ones; approximately 40%-50% of your DNA originates from cabbage! Your human body is truly an amazing machine – discover new facts about yourself to amaze friends and family and make quiz competitions an easier test of knowledge!
4. The human brain is made up of water.
Human bodies consist of various systems that each serve a vital function. The brain serves as the command center, pumping blood throughout all organs; digestive processes break down food for absorption of nutrients; while circulatory systems transport blood, oxygen, carbon dioxide hormones and other chemicals throughout.
The human brain is one of the most complex organs, comprising approximately 75% water. It features trillions of neurons – nerve cells responsible for sending and receiving information – with thousands of connections called synapses between each neuron. Unfortunately, doctors and scientists still don’t fully comprehend all aspects of its operation!
Here are a few interesting facts about human biology that might surprise you:
A normal human brain weighs three pounds and contains roughly 90% water. To protect its vitality, the skull contains three meninges that serve as protective barrier linings; additionally, there’s the blood-brain barrier, which keeps harmful circulating factors away from reaching the brain.
Our bodies contain over 60,000 miles of blood vessels – enough to cover more than two laps around the planet! These blood vessels work hard to bring oxygen and nutrition throughout our bodies. Their job is essential in providing us with enough energy to walk, run, and stay alive!
Without our circulatory system, it would take us 690 days to walk around the globe and we would not be able to breathe since our lungs could no longer exchange oxygen and carbon dioxide as part of their job of keeping us alive. Instead, these organs work in concert to keep us alive!
Did you know that our DNA is roughly comparable to cabbage’s? Additionally, humans possess 2.5 million sweat pores, each minute we shed over 30,000 dead skin cells from our bodies and our eyes can distinguish over 36,000 pieces of information per hour – not to mention millions of tiny nerve endings that detect pressure, temperature and movement!