Facts about the Human Body

We, humans, have been gifted with a beautiful body, which is composed of billions of cells, major types of tissues, nerves, and other organs, which keeps on functioning from the time of our first breath till the last breath. There are few important and essential organ systems in our body, which functions non-stop to keep us active and alive.

Now it’s our responsibility to save and protect this god’s gift.

How much we know about human anatomy and physiology. In this article, let us learn some important facts about the Human Body.

Listed below are a few amazing facts about our body, which we are not aware of.

Fascinating Facts about the Human Body

Fact – No-01

A human brain comprises about 86 billion nerve cells and weighs about 3 pounds.

According to scientific research, our brain is more active at night than during daylight.

Fact – No-02

The saliva produced by a human tongue is more than enough to fill two swimming pools. Compared to the other muscles in the human body, the tongue is considered as the strongest muscle.

Fact – No-03

As per the analysis, a healthy human being can survive two days without drinking water,

15 to 20 days without eating food and 10 to 11 days without sleeping.

Fact – No-04

There are more than thousands of different bacteria in and around the mouth. These bacteria do not cause any harm; in turn, they protect our body from invading harmful disease-causing microorganisms.

Fact – No-05

In a single day, blood travels about the distance of 19,312 kilometres and our heart pumps around 1.5 million barrels of blood in our lifetime, which can fill 200 train fuel tanks.

Fact – No-06

Human ears and nose keep on growing till a certain age of an individual. Our ears grow a quarter of a millimetre per year and the size of our nose will be always equal to the size of our thumb finger. Our eyes will not grow and remain the same size from birth.

Fact – No-07

A newborn baby has 300 bones and an adult human has 206 bones. Among the different types of bones, the jawbone is the hardest bone in the human body.

Fact – No-08

The thigh-bone of an adult human is considered as the longest bone, which measures about 18  inches (46 cm) and the shortest bone is present in the human ears, which is shorter than a rice grain.

Fact – No-09

Human teeth are hard as rocks and the Enamel of our teeth are considered as the hardest substance in the human body. There are four different types of teeth in humans- Incisors, Canines, Premolars, and Molars.

Fact – No-10

Our skin carries more than 32 million of Bacteria, which are harmless and they protect our body by invading disease-causing microbes.

Fact – No-11

The main source of body odour is our feet. A pair of feet usually have 5 to 6 lakhs of sweat glands.

Fact – No-12

There are totally 300 million alveoli in our lungs, which helps in the exchange of oxygen and carbon dioxide gas. In a day we inhale about two million litres of air.

Fact – No-13

The hair colour or pigmentation represents the total number of hair follicles. An individual with black coloured hair has more than one lakh hair follicles. An individual with brown coloured hair has about one lakh hair follicles. An individual with coloured hair has about eighty thousand hair follicles.

Fact – No-14

In a day, we inhale about two million litres of air. Overall, a healthy person breathes approximately 20,000 breaths per day.

Fact – No-15

It is advised to sleep for at least 8 hours because our body releases growth hormones during sleep. The sleep and wake cycle is controlled by the melatonin hormone, which is synthesized by the pineal gland of the endocrine system.

These were some interesting, fascinating, and amazing facts about the human body. For more facts and information about the human body and other living species, students can visit our website at BYJU’s and also learn by watching interactive video lessons on various biology topics by subscribing to the BYJU’S YouTube Channel.