With fish, what do we have in addition to being exposed? The types of joints we (and most of the rash) are most likely to start with the same common ancestors. But this is not a feature that we all share with the rash.
Humans, other ground rash, and jaw fish are seriously pairing. The lubricating cavity inside these joints makes them more mobile and stable as it allows bones or cartilage to slip against each other without friction, which facilitates transportation.
The actual pairs of these couples were uncertain. Now, Chicago University biologist Neilima Sharma and her colleagues have taken a look at what kind of fish forms this type of joint. Synovial joints are in jawed but when not without fish. The question was left to whether they are usually the only feature of the Bonnie skeleton or if they are also found in the fish with cartilage skeleton, such as sharks and skates (there are not cartilage skeleton ground animals).
As Sharma and his team found, cartilage fisheries with jaws, such as skate fetuses studied them, develop these couples, while jabius fish like lamps and hegfish are lacking.
So what can it mean? If the jaw fish are jointly paired by all the jaws, including us, it would have been produced in our shared ancestors.
Some fish in our past
Although the joint ancestors of the rash with Synovial Joints is still a case, but the oldest sample with evidence of these joints Bootryolipase canyonisisFor, for, for,. A fish that lived about 38 387 to 360 million years ago during the mid -to -deinne era.
When using CT scanning for study A Bootryolipase Fusil, Sharma saw a joint cavity between shoulder and packets. Whether the cavity was filled with synovial fluid or cartilage, it is impossible to tell, but in any way, she thinks it seems that she has worked like a synovial joint. On the contrary, the gems of the early jailes fish do not lack symbols of synovial joints.