Bones
Muscles
Organs
How the body works
Facts
100
as adults we have less bones now then we were kids how many bones do we adults have now.
children are born with 300+ bones
Adults have 206
the bones fuse over time to form bigger bones.
100
how many muscles does the human body contain?
About or above 600 muscles, the exact amount is unknown due to where a muscle begins and ends.
100
what are the 5 vital organs?
The five vital organs in the human body are the brain, heart, lungs, kidneys, and liver. There are many other organs
100
what is considered part of the skeletal system but not counted as a bone?
Teeth
100
true or false
Does the human body has more muscles than a caterpillar?
False! a human body contains 600-650 muscles
A caterpillar contains over 4,000 muscles
200
What is the smallest bone in the body?
the ear!
200
muscles are attached to bones via what?
Tendons
200
the acid in our stomach is strong enough to do what?
melt metals, our stomachs have evolved to withstand the acid and constantly regenerates lost cells.
200
how much water makes up the human body?
about 45% to 75% depending on the person's diet, weight, age and many other factors.
The general accepted area is 60%
200
how many muscles do you use when you walk?
about 200 muscles per step.
300
where are most of your bones?
106 in the hands and feet!
300
what is the busiest muscle? The one that is constantly moving and adjusting.
The eyes, your eyes are constantly moving, and adjusting to various levels of light!
300
what is the largest organ?
the skin is the largest organ.
300
how does the body produce heat?
Moving around, muscles account for 85% of the body heat.
300
True or false
Bones are 5 times stronger than steel?
Bones are stronger than steel, however they are less dense than steel making them look weak. Bones can withstand more force than steel.
400
there are 2 types of bones, what are they?
The two main types of bone tissue are
compact bone (also called cortical bone), which is the hard outer layer, and cancellous bone (also called spongy or trabecular bone),
400
where is the strongest muscle located?
The masseter muscle, also known as the jaw muscle, is the strongest muscle in the human body in terms of force production
400
How fast does the blood in your body move?
3-4 Miles per hour
Your body has about 5.6 liters (6 quarts) of blood. This 5.6 liters of blood circulates through the body three times every minute.
400
when you crack your knuckles what exactly is happening?
When you crack your knuckles, you're basically releasing air out of the joints.
400
How much of the light spectrum can humans see?
0.00035% of the light spectrum, This means there are infinitely more colors that we cannot comprehend. 
500
when a broken bone heals it forms what?
A stronger bone, bones are meant to protect the organs.
500
what muscle never rests?
Cardiac or the heart muscles, They Never stop moving.
500
what powers the brain?
Glucose and Oxygen.
The brain is powered by the glucose and oxygen which are provided to it in the blood.
500
how many miles of blood vessels are there within the human body?
100,000 miles
500
What is the universal blood?
O negative, This is the universal donor blood. the blood can be given to anyone but O negative can only receive from O negative.
600
where is the funny bone located?
there is no such thing as the funny bone, It is the ulnar nerve inside your elbow.
600
muscles can pull but they cannot do what?
Push, Muscles can't push because they can't lengthen or extend on their own.
they can only exert force by pulling on the bones they are attached to; when you "push" with a muscle, you are actually using a set of opposing muscle groups to contract and pull in the direction of the push,
600
How many miles does you blood travel a day?
in one day, the blood travels a total of 19,000 km (12,000 miles)—that's four times the distance across the US from coast to coast.
600
where do blood cells come from within the body?
from your bones, specifically the bone marrow.
600
what is the rarest blood type? also known as the golden blood?
Rh-null, also known as "golden blood", is a rare blood type where red blood cells lack Rh antigens
the reason why it is called the golden blood is 1 in 6 million people have it. That means of the 8 billion humans on this planet only 1,700 humans have this blood type.
1000
How many elements make up the human body?
about 21 total elements of the 118 total elements.