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Science: How many organs are there in the human body?

2022-11-25 23:23:42Lifestyle SHKRUAR NGA REDAKSIA VOX

 

The human body has been studied for millennia but even today the answers to this question can be different: there are 78 or 283 or 315 organs or trillions if you count every single nerve. The amount of organs inside our body depends on how we count them, explains Lisa MJ Lee , associate professor of cell and developmental biology at the University of Colorado in Denver.

Organs, Lee points out, are collections of tissues that work together toward a common goal, each providing a function for human performance or survival itself. However, only five are absolutely necessary to live: the brain, the heart, the liver, a kidney and at least one lung.

"The amount of organs in our body depends on how we count them," explains Lisa MJ Lee, associate professor of cell and developmental biology at the University of Colorado in Denver. "In general, organs are collections of tissues that work together toward a common goal and each provides a function for human performance or survival itself.

Loss of complete function of one of these organs results in death. Instead the human body is able to survive without many other parts or with the help of medical devices to replace a malfunctioning element. For this reason, the calculation of the number of organs is related to how they are counted, but it can also depend on the person doing it. The total number of 78 is often taken into account, including the vital organs, tongue, stomach, thyroid, urethra, pancreas and many other single or paired organs.

In addition there are bones and teeth which are counted only once. Anatomists define organs differently, if you study tissues at a microscopic level the list gets longer compared to studying what is visible to the naked eye. In 2017 a team of researchers analyzed the functions of the mesentery, a double membrane that surrounds the small intestine and keeps it together by connecting it to the back wall of the abdomen itself. Many histologists and anatomists have agreed on the classification of the mesentery as a true organ, but there is no institution that decides what qualifies as an organ or maintains an official numbering.

From Lee's point of view, when different types of tissue come together and work together, that's an organ. Considering each bone of the skeleton individually, the number 206 is added to the list of 78 organs which, however, already considers all our bones as a unit, so the total from 284 becomes 283. If we count the 32 teeth separately, then we arrive at 315 organs. Which become trillions if we were to count the ligaments, tendons, nerves and so on individually.

Scientists have recently discovered a new blood vessel that runs along our arms is a vein that normally forms in the fetal stage and disappears after about eight weeks. The tendency to disappear decreases with age and the artery continues to grow in adulthood.

The discovery of a new set of salivary glands inside the head where the nasal cavity and throat meet has remained hidden until now and was discovered by chance by doctors at the Netherlands Cancer Institute in Amsterdam. Confirming that the number of organs in our body does not have a certain and definitive answer.


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