The human body is made up of 50 to 75 trillion ( = million millions) cells. 2.5 trillion of them are red blood cells. To stay functional the body replaces about 25 million cells per second!
The gastric acid in your stomach contains hydrochloric acid and sodium chloride (pH 1 -2). If you would remove the protective layer of mucus in your stomach, the stomach would digest itself…
A sneeze can exceed 160kph, a cough 100kph and a male ejaculation 45kph.
Humans walk at around 4kph, run up to 38kph.
Hair grows at a rate of 1.25cm per month, while a fingernail grows about 3.5cm a year.
Do You know why humans have eyebrows? Eyebrows actually protect the eyes from sweat or rain dripping down into them, and guide the liquid around to the side of the face.
Our Brain is an amazing & highly complex organ. Consisting of 80% water, the brain only makes up 2 precent of our bodyweight, yet regulates all body functions, creates about 70.000 thoughts, and more electrical impulses than all the telephones in the world, each day. To do all this, the brain needs a lot of energy ( 10-20 Watts ) and consumes about 20% of the body’s oxygen and calories. Strangely the human brain and its 100 Billion neurons are more active while asleep than during the day & although it processes and recognizes pain from all over the body, the brain itself can’t feel pain. The right side of the brain controls the left side of the body, and the left side of the brain, controls the body’s right side.
The human body has about 96 000km of blood vessels.
The biggest blood vessel is the Aortic artery and delivers the blood from the left ventricle (heart) to the body. It is about 2.5-3.5 cm in diameter, and 30-40cm long.
The smallest blood vessels are called capillary, and are just 5-10 μm in diameter.
The adult body has 206 bones, while a newborn infant has between 300 and 350 bones.
Some of these bones fuse together over time, and form one bone e.g the skull.
The hands and feet combined make up for over half of all the bones in the body. There are 27 bones in each hand, and 26 in each foot.
The longest bone in the body is the femur (about 1/4 of the body height), while the Stirrup in the ear is the smallest with about 1/10 of an inch.
The world’s deadliest animal is?
No, not the snake, and it’s not the shark either.
It’s the mosquito! Worldwide over one million people die every year by mosquito transmitted diseases like malaria. Only the females suck blood, because they need the protein & iron from the blood to produce their eggs.
To cover up is the best protection.
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