8 Facts About Your Anatomy That Will Surprise You
The human body is designed in a well-orchestrated manner and God has given each organ to perform a unique function. No organ can function independently and the whole body functioning involves lots of coordination, connections, signal transmissions, and secretions. We will be amazed to know the anatomy of each organ and its functions. Here are eight amazing facts about our anatomy that will surprise you.
1- Eyes Can Differentiate 2.3 and 7.5 Million Different Colors
Can you believe that your eyes can differentiate 2.3 and 7.5 million different colors? Yes, it can. From a biological perspective, the human eyes can differentiate three colors red, green, and blue. But the human brain can interpret million different colors.
The retina of the eyes has two types of cell rods and cones. Rods detect the presence of light and the cones detect different wavelengths of light, allowing the brain to interpret color. There are three types of cones in the human retina namely red-sensing, blue-sensing, and green-sensing cones. Light enters the eye through the pupil and is focused onto the retina. All the wavelengths hit all the cells, but red cones respond to the red light and so on. These signals get sent to the brain and the brain interprets what color you must be looking at depending on which cones were responding and how much the cones were responding.
2- Your Heart Beats 100,000 Times per Day
Human heart, Credits: pixabay
Everyone knows the heart is the pivotal organ in the body that performs crucial functions. This muscular organ acts as a pump and sends blood throughout the body. The surprising thing is it beats 100,000 times a day and pumps about 7,200 liters of blood. So during an average lifetime (70 years), the human heart beats more than 2.5 billion times.
3- Your Mouth Produces About 1 Liter of Saliva Each Day
Saliva is a clear liquid produced by the salivary glands in the mouth. It is estimated that a healthy person produces between 1 and 1.5 liters of saliva each day. The production of saliva tends to vary, it is maximum during the afternoon and lowers in the evening time. It is the saliva that decides whether your food is tasty or not. The other interesting properties of saliva include it facilitates digestion, helps heal wounds in the mouth, and removes germs from the mouth.
4- Our Ears Contain the Smallest Bones
Human Ear, Credits: pixabay
The smallest bone in the human body is called stapes, located in the middle ear. The size of the staples is 3mm × 2.5mm. The Stapes is the smallest of the three bones in the ear (Malleus and Incus are the other two) and it looks like a bell.
5- Babies Have More Bones
Bones, Credits: pixabay
We know very well that we have 206 bones. But we are born with 300 bones. Some of the bones fuse as our bodies grows older and taller. The longest bone in the human body is the femur that is located in the thigh.
6- We Are Taller In the Morning than At Night (About 1cm)
While we are lying down in a resting position, the spine is said to “spread out” or decompress, so when we wake in the morning we are taller after lying in bed all night. Also, astronauts returning from space are a few inches taller than they were on the earth because of the lack of gravitational forces on their spines away from the earth’s atmosphere.
7- How Many Bacteria in the Belly?
Bacteria, Credits: pixabay
Microbes are an important part of the body and they do good things for us. The skin has trillions of individual bacteria representing hundreds or even thousands of phylotypes. The average person has 67 different species of bacteria in their belly button.
8- The Human Brain Is the Largest
Human brain, Credits: pixabay
The human brain is the largest brain of all vertebrates relative to body size. It weighs about 1.5 kilograms. The average male has a brain volume of 1,274 cubic centimeters. The average female brain has a volume of 1,131 cm3.