Brain
What organ controls everything we do, think, and feel?
brain
What organ pumps blood around your body?
The heart.
Your body has more than 600 of these
Muscles
What are the five basic senses?
Sight, hearing, smell, taste, and touch.
What part of your body never stops growing — your nose, ears, or eyes?
Your nose and ears.
How much does an adult brain weigh?
About 1.3–1.4 kilograms.
How many chambers does the human heart have?
four
The strongest muscle in your body is in your…
The jaw muscle (masseter).
How many times does a human blink in one minute on average?
15-20 times
What is earwax for?
It protects the ear from dust and bacteria.
Which side of the brain controls the right side of the body?
The left side.
How many times does the heart beat per minute on average?
About 60–100 times per minute.
How many bones does an adult human have?
206
This sense helps you feel pain, heat, and cold.
touch
How much of your body is made of water?
About 60%.
What happens in your brain when you dream?
It becomes very active — parts of it create images and emotions
What is the name of the blood vessels that carry blood to the heart?
veins
What happens to your muscles when you exercise regularly?
They become stronger and larger.
How many different smells can humans distinguish?
1 trillion
How many skin cells do we lose every day?
Millions — around 30,000–40,000 every minute!
How many percent of our brain do we actually use — is the “10%” myth true or false?
False — we use almost all parts of our brain!
Can your heart really “skip a beat” when you’re scared or excited?
Yes — emotions can cause your heartbeat to change
What are the smallest bones in the human body, and where are they?
The ear bones
Which sense uses the largest part of the brain?
Sight (vision).
Is it true that bodies give off light?
Yes — our bodies emit a tiny amount of light, but it’s too weak for the eyes to see.