Skin renews monthly
Every month, the skin sheds about 30,000-40,000 dead cells daily, losing up to 4 kg of cells per year.
Eyes distinguish millions of colors
Eyes can distinguish around 10 million shades, though the brain processes only the main ones.
Brain runs on electricity
The brain generates about 20 watts, enough to power a light bulb, but this also leads to quick fatigue.
Length of blood vessels
If all the blood vessels in the human body were connected in a line, their length would be 100,000 kilometers—enough to circle the Earth 2.5 times.
Heart creates massive pressure
The heart is powerful enough to squirt blood up to 10 meters.
Protects the body from the external environment, regulates body temperature and water balance.
Produces and releases hormones that regulate many body functions, including metabolism, growth and development.
Helps protect the body from infections and diseases, removes excess fluid from tissues.
Controls and coordinates the actions of the body, processes sensory information.
Provides shape and protection to the body and serves as a foundation for muscles.
Provides body movement, posture maintenance and heat production.
Ensures the supply of oxygen to the blood and the removal of carbon dioxide from the body.
Breaks down food into nutrients that can be absorbed and used by the body.
Removes waste from the body, regulates water-salt balance and blood pressure.
Carries blood, nutrients, oxygen, carbon dioxide, and hormones to and from the body's cells.
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