Here are some facts about the human body: Brain

 Here are some facts about the human body:

Brain

The brain uses more than a quarter of the body's oxygen and can generate over 48 thoughts per minute. 

Heart

The heart beats around 100,000 times per day, 36.5 million times per year, and over a billion times if you live past 30. 

Blood

The average adult body contains about 1.2 to 1.5 gallons (4.5 to 5.5 liters) of blood. 

Skin

The color of a person's skin is determined by the amount of melanin in their body. 

Lungs

The adult lungs have a surface area of around 70 square meters. The left lung is about 10 percent smaller than the right lung. 

Teeth

Human teeth are as strong as shark teeth. There are four different types of teeth in humans: incisors, canines, premolars, and molars. 

Kidneys

The kidneys are the excretory organ that purifies the blood by removing waste materials. 

Intestines

The average length of the intestines is 25 feet, with the small intestine being over 20 feet long and the large intestine being 5 feet long. 

Tongue

The tongue twists to form sounds and pushes around food while you're awake, and moves saliva down your throat while you're asleep. 

Smell

Everyone has a unique smell, except identical twins. 

Fingerprints

A human fetus acquires fingerprints at the age of three months. 

Sleep

REM sleep makes up around 25% of total sleep time and is often when you have your most vivid dreams