Discovered more new body parts in the human body
A team of researchers led by Senior Lecturer, Dr Szilvia Mezey at the Faculty of Biomedical Sciences - University of Basel (Switzerland) and Professor Jens Christoph Türp from the University Center for Dental Medicine Basel (UZB) has discovered a new organ in the human body. It's a third layer of muscle deep inside the masseter muscle, which is important for chewing.
A new body part has just been discovered in anatomy.
Modern Anatomy textbooks have so far described only two classes of the masseter muscle. Accordingly, the muscle has two layers, a deep layer and a superficial layer.
"Some historical texts have also mentioned the possible existence of a third muscle layer, but those texts are extremely conflicting about its location," the study said. Meanwhile, the study titled "Human Muscles Revisited: The First Description of the Coronoid Organ," published in the journal Annals of Anatomy, detailed the third layer of the masseter muscle. .
The researchers dissected 12 human heads, preserved in formaldehyde, and CT scans of 16 cadavers, while also reviewing an MRI scan of a living subject. They came to identify a 'anatomically distinct' third class of masseter muscle.
Illustration of the human muscular system.
Dr Mezey, lead author of the study, said in a statement: 'This deep-seated portion of the masseter muscle is clearly distinguishable from the other two classes in terms of its process and function.
Co-author Türp adds: 'Although it is often assumed that anatomical research over the past 100 years has left no mark, our findings are similar to those of zoologists discovering a new vertebrate species'.
The third layer of the masseter muscle is clearly distinguishable from the two upper layers in terms of its process and function. In the report, the team writes that, based on the arrangement of the muscle fibers, this layer of muscle is likely to help stabilize the mandible by "elevating and retracting" the coronoid process. And in fact, the newly discovered muscle layer formed is the only part of the bite muscle that can pull the jawbone back, says Mezey.
The researchers suggested naming the muscle class as 'Musculus masseter pars coronidea' or 'pars coronidea' because the newly discovered muscle layer is connected to a small triangular part of the mandible called the lower jaw. is the parrot's beak.
It may feel a little odd to witness the discovery of a new, previously unknown organ or muscle while having spent years being taught lessons in anatomy, but such cases are not. must be rare. Most recently in 2020, another team of researchers discovered an extra set of salivary glands right inside our heads.
In October 2020, researchers discovered that humans have a previously undiscovered set of extra salivary glands right inside our heads.
Image in new salivary gland discovery in 2020.
This discovery then made many people wonder if there were any other mysterious organs in the body that we have not discovered yet. Because as you know, scientists only discovered what the clitoris looks like in the 2000s.
In the 2020 discovery, "unknown entity" was discovered by accident. A team of scientists studied prostate cancer patients. They use a type of advanced imaging method called PSMA PET/CT. And this time, the image showed something different.
Researcher Wouter Vogel at the Dutch Cancer Institute, explains: "As far as we know, the only salivary or mucous glands in the nasopharynx are microscopic in size and have up to 1,000 glands spread throughout the mucosa. . So imagine our surprise to find this route."
So far, we have known about three main salivary glands: the parotid, subchondral, and sublingual. They have a role in the digestion of food. In addition, humans have about 1,000 microscopic salivary glands spread throughout the oral cavity and digestive tract. But they are too small to be seen with the naked eye. Meanwhile, the salivary gland system discovered by Dr. Vogel's team is much larger, located behind our nose, above the roof of our mouth, and near the center of our head.
The team suggests that this area should be avoided during radiation treatment because the salivary glands are known to be particularly vulnerable to radiation damage.
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