Human Body Facts for Kids

Did you know that the human body is made up of trillions of cells? Or that our brains control everything we do? Learning about the human body can be really interesting, and it’s a great way to learn more about how you work. Check out these fun human body facts for kids! These amazing facts will surprise and inform you. They make great, crazy trivia questions too!

BONUS: Download a free activity packet about the body system. There is a crossword puzzle with the parts of the body and a word search to help you review these interesting facts about your own body! You can download your freebie at the bottom of the post.

Human Body Facts for Kids

DIGESTIVE SYSTEM FUN FACTS ABOUT THE HUMAN BODY

The human digestive system is amazing! It’s around 30 feet (9 meters) long and can process about 50 tons of food in a year. Here are some other fascinating facts about the human digestive system:

  1. The first stop in the digestive system is your mouth where you chew food and produce saliva to help break it down.
  2. The esophagus is the tube that carries food from your mouth to your stomach. Think of it as the food highway!
  3. The stomach is meant to hold about one quart of food but it can expand to hold about one gallon (four liters) of food.
  4. There are around 100 trillion bacteria living in the human digestive system – that is more than all of the stars in the Milky Way Galaxy!
  5. The human small intestine breaks down food and absorbs the nutrients from the food. It is about three times the length of your body.
  6. The large intestine removes the rest of the water and sends all the bad waste out as poop.

CIRCULATORY SYSTEM FACTS ABOUT THE HUMAN BODY

The human circulatory system is responsible for transporting blood, oxygen, and nutrients around the body. It’s made up of the heart, arteries, veins, and capillaries. Here are some interesting human circulatory system facts:

  1. The human heart pumps around 2000 gallons (7570 liters) of blood every day.
  2. The average adult has around 60,000 miles (96,560 kilometers) of blood vessels – that is long enough to go around the world twice!
  3. The human circulatory system produces around 2 to 3 million red blood cells every second.
  4. Your heart works harder and faster when you exercise, giving more blood and oxygen to your muscles.
  5. When you are sick, the blood transports additional immune cells to the infected area, where they gather and defend against harmful infections.

Read more Heart Facts for Kids.

RESPIRATORY SYSTEM FACTS ABOUT THE HUMAN BODY

The human respiratory system is responsible for transporting oxygen into the body and removing carbon dioxide. It’s made up of the nose, throat, lungs, and airways. Here are some interesting human respiratory system facts:

  1. The most air human lungs can hold is about six liters – that is three large soda bottles!
  2. We breathe in around 2000 gallons of air every day.
  3. The average person takes around 20,000 breaths every day. When you exercise, your body needs more oxygen, so you breathe faster and deeper.

SKELETAL SYSTEM HUMAN BODY PARTS AND FACTS

The human skeletal system is responsible for supporting and protecting the body. It’s made up of bones, joints, and ligaments. Here are some interesting human skeletal system facts:

  1. The human skeleton is made up of 206 bones.
  2. A newborn baby is born with around 300 bones, but many of these fuse together as they grow.
  3. The human femur (thigh bone) is the longest and strongest bone in the body.
  4. The malleus (hammer), incus (anvil), and stapes (stirrup) are the smallest bones in the human body. These tiny bones in your middle ear transport sound vibrations from the air to the liquid inside your ear.

MUSCULAR SYSTEM – HUMAN BODY FACTS FOR KIDS

The human muscular system is responsible for the movement of the body. It’s made up of muscles, tendons, and ligaments. Here are some interesting human muscular system facts:

  1. The human heart muscle works the hardest in the body.
  2. The human jaw muscle (the masseter) is the strongest muscle in the human body.
  3. There are around 600 muscles in the human body.
  4. There are three different types of muscles: skeletal, smooth, and cardiac muscles.
  5. The gluteus maximus muscle is the largest in the human body. Your “butt” is super important. It helps you to stand up and walk!

Read more Muscular System Facts for Kids.

Human Body Facts for Kids Free Printable

NERVOUS SYSTEM FACTS ABOUT THE HUMAN BODY

The human nervous system is responsible for transmitting messages between the body and the brain. It’s made up of the brain, spinal cord, and nerves. Here are some interesting human nervous system facts:

  1. The human brain is the third heaviest organ in the human body (the skin is the heaviest).
  2. The human brain makes up around 2% of the human body weight, but it uses 20% of the energy.
  3. There are around 100 billion neurons in the human brain.
  4. The right side of your brain controls the left side of your body. The left side of your brain controls the right side of your body. (Get a FREE coloring page about the right and left brain – a laterality coloring page.)
  5. Deep inside one section of the brain, there is an area called the hippocampus. It helps us to remember, imagine and dream.
  6. Your funny bone is not actually a bone. It is a nerve by your elbow.  The “funny bone” got its nickname because when you hit the nerve it feels all tingly.

INTEGUMENTARY SYSTEM HUMAN BODY FACTS FOR KIDS

The human integumentary system is responsible for protecting the body from injury and disease. It’s made up of the skin, hair, nails, and sweat glands. Here are some interesting human integumentary system facts:

  1. Several functions are carried out by skin on the human body. For example, it helps maintain body temperature, guards against harmful microorganisms, prevents damage from hot or cold temperatures, and alerts us to pain.
  2. The human skin is the largest organ in the body. It covers an area of around 20 square feet (1.8 square meters).
  3. About 15% of the body weight of an average adult human is skin. This means it can weigh around 8 pounds on an adult!
  4. We lose about 30,000-40,000 dead skin cells every minute. This means you lose over one million skin cells in a day!

IMMUNE SYSTEM FACTS ABOUT THE HUMAN BODY

The human immune system is responsible for protecting the body from disease and infection. It’s made up of the lymph nodes, thymus, spleen, and white blood cells. Here are some interesting human immune system facts:

  1. The human body has around 500 different types of bacteria living on it.
  2. The human skin acts as a barrier to protect the body from infection.
  3. The human body produces around two billion white blood cells every day.

These are just some of the amazing human body facts for kids! Learning cool information about how your body works can be really interesting, and it’s a great way to stay healthy and know what to do if you get sick. Keep exploring and learning more about the human body, and you’ll be an expert in no time!

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Human Body Facts for Kids

WANT MORE FUN FACTS FOR KIDS?

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WANT TO LEARN MORE ABOUT BODY AWARENESS?

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