American scientists from the University of Chicago have established an epidemic joint in humans and animals to ensure the flexibility and mobile of the jaws and other parts of the skeleton. The opening is published in the Journal of Plos Biology Science.
Animal joints allow bones and cartilage to slip compared to each other and are considered a major feature of most vertebrates. They are found in ground animals and bones, but their origin is still a mystery.
Researchers have studied anatomical and developed joints in the lights (binary fish) and two types of cartilage fish – bamboo sharks and small ribs. The analysis shows the abdominal joints, similar to the fluid, found in cartilage, but not in the foam. In addition, protein and the characteristic development process of the interpretation joints of other vertebrates have been found in cartilage fish.
These joints may have appeared among the common ancestors of the jaw, becoming an important step in the evolution of the skeleton, the authors of the study noted.
Scientists have also used CT scan to study Botholepis fossil fish, found it in which is the oldest epidemic joint. This confirms that such joints occurred in jaw more than 400 million years ago.
In the future, scientists plan to study other fossil fish joints and make more detailed comparison of two -round vertebrates and animals. This will help better understand how the skeletal system develops, including the joints of modern animals and people.