unknown facts about human body

Here are a few unknown or lesser-known facts about the human body:

1. The average person has about 100,000 hairs on their head, and the hair on our head grows about half an inch (1.25 cm) per month on average.
2. The human nose can detect over 1 trillion different scents, making it one of the most sensitive organs in the body.
3. The human body produces enough heat in 30 minutes to bring a gallon (3.8 liters) of water to boiling point.
4. The human ear can hear a wide range of frequencies, from about 20 Hz (hertz) to 20,000 Hz. Some people can even hear higher frequencies, up to around 22,000 Hz.
5. The human eye can see a visible spectrum of light, ranging from about 390 nanometers (nm) (violet) to 700 nm (red).
6. The human body has a natural defense system called the lymphatic system, which helps to fight off infections and diseases. The lymphatic system does not have a pump, like the heart, to circulate fluids, so it relies on movement and muscle contractions to keep the fluids moving.
7. The human brain is the most complex organ in the body, and it is responsible for controlling all of the body’s functions, including movement, thoughts, and sensations. The brain is made up of more than 100 billion nerve cells (neurons) and trillions of supportive cells called glial cells.
8. The human body contains enough fat to make seven bars of soap.
9. The average person has about 100,000 miles (160,934 kilometers) of blood vessels in their body.
10. The human body has 206 bones, which are connected by joints and held in place by muscles and tendons. The bones also provide a framework for the body and protect vital organs.