Human Body Facts

Capillaries connect arteries and veins, and their total number fluctuates between 100 to 160 billion.
The total length of blood vessels in the human body is approximately 100 thousand kilometers.
The average diameter of capillaries is 5-10 micrometers.
A healthy human heart at rest beats around 70 times per minute or 100 thousand times per day.
The volume of blood pumped by the heart varies from 5 to 30 liters per minute.
A lifespan of 70 years, the heart beats more than 2.5 billion times and pumps 250 million liters of blood.
An adult human body contains about 5 liters of blood, while a child has about 3 liters.