A human being loses an average of 40 to 100 strands of hair a day.
133
If you hold farts in during the day, they'll just come out when you sleep.
16
The brain receives 20% of the body’s oxygen and 25% of total body glucose utilization, despite it accounting for only 2% of a person’s weight (about 1.4 kilograms).
8
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
There's 100 trillion good bacteria living in your body.
17
There are about 1,400 different species of bacteria in your belly button.
10
The human brain doesn't stop developing until about 25 years old.
102