Every day, we see, breathe, touch, and feel, but how does our body make this possible? In AsapSCIENCE’s latest video, “Why Your Body Is AMAZING!” hosts Mitchell Moffit and Gregory Brown explain the human body consists of seven octillion atoms, making up the 37 trillion cells in our body, which can regenerate themselves over time.

The cells that line up the stomach, regenerate every five days, which makes sense, since stomach acid can dissolve metal. Meanwhile, the skin’s outer layer, known as the epidermis, sheds every two to four weeks (roughly 1.5 pounds per year) of dead skin. On the other hand, some cells have been with us our entire lives, specifically those of the inner lens of the eyes, the muscle cells of the heart, and the neurons of the cerebral cortex in the brain (responsible for our memory).  

When it comes to our sight, although we spend 10 percent of the day blinking, our eyes can actually distinguish between 2.3 to 7.5 million colors. In fact, studies have shown that after viewing 2,500 images for only three seconds, participants could recall if they had seen one of the images with 92 percent accuracy. This is contrary to the belief that long-term memory is not capable of storing images with detail.

Our touch and grasp, along with our sight, help us pinch and grab objects with our thumb, using the index and middle finger. However, it is the ring and pinky that gives us the ultimate hand power. When we put our hands together, we capture roughly the size of our heart as it beats 100,000/day, pumping 5.5 liters with each pulse, which is close to 3 million liters of blood every year. If a person were to live to 75, it would fill 90 Olympic size swimming pools.

Now, when the heart stops beating, human decomposition begins around four minutes after death. This process, known as self-digestion, occurs when our enzymes and bacteria eat us away. In fact, 3 to 5 pounds of your body is made up of bacteria. In comparison, in an unclean mouth alone, 100 million to one billion bacteria can grow on each tooth — with 32 teeth each, some of us have more bacteria in our mouth than there are people in the world.

Click on the video above to learn more about the power of the human body.