2021-03-09

Scientists are surprised by the ability of sea slugs to “self-cut” their heads and grow new bodies

By yqqlm yqqlm

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p >Scientists are surprised by the ability of sea slugs to “self-cut” their heads and grow new bodies

“We were surprised to see that the head will be Move,” said Sayaka Mitoh of Nara Women’s University in Japan. “We thought it had no heart and other important organs and would die soon, but we were surprised to find that it could regenerate the entire body.” This discovery was purely accidental. Mitoh is a PhD student in Yoichi Yusa’s laboratory. The Yusa laboratory bred sea slugs from eggs to study their life history characteristics. One day, Mitoh saw something unexpected: an individual sea slug was moving around without a body. They even witnessed an individual doing this twice.

Scientists are surprised by the ability of sea slugs to “self-cut” their heads and grow new bodies(1)

Researchers report that the head After separating from the heart and body, immediately move on its own. Within a few days, the wound on the back of the head closed. The heads of relatively young sea slugs begin to feed on algae within a few hours. They started the regeneration of the heart within a week. In about three weeks, the regeneration was complete. The other sea slug had no food on its head and died in about 10 days.

Mitoh and Yusa are not sure how sea slugs deal with them. However, Mitoh said they suspect that there must be stem cell-like cells at the cut end of the neck that can regenerate the body. It is also unclear why they do this. One possibility is that it helps eliminate internal parasites that inhibit their reproduction. They also don’t know what direct prompt prompted them to throw away other parts of their bodies. These are areas for future research.

Scientists are surprised by the ability of sea slugs to “self-cut” their heads and grow new bodies(2)

The sea slug ingested by itself The chloroplast of the algae is incorporated into your body. This gives these animals the ability to fuel their bodies through photosynthesis. They believe that this ability may help them survive long enough to regenerate a body after self-cutting.

These discoveries in sea slugs represent a new way of self-splitting, in which animals with complex body plans will abandon most of their bodies.

“Since the shed body is usually active for several months, we may be able to use living organs, tissues and even cells to study the mechanism and function of the plastids,” Mitoh said. “Such research is almost completely lacking, because most of the research on the plastids of sea slugs is done at the genetic or individual level.”