zhōng guó中国kē xué jiā科学家jiē kāi揭开rén lèi人类zào xuè造血zhī之mí谜
When was the blood in the human body first produced?
And where does it come from?
Recently, Chinese scientists solved this puzzle about the origin of blood formation.
The related research results have been published in the international scientific journal Nature.
In the past, people always believed that blood cells appeared only after the embryo developed to a certain stage.
But scientists found that the time when humans begin making blood is much earlier than previously thought.
In the earliest stage of embryonic development, a place called the yolk sac was already working like a factory, producing blood cells ahead of time.
Not only was the timing earlier than expected, but scientists also discovered the true location of blood formation.
They confirmed that the earliest blood-forming cells did not come from the embryonic tissue previously believed to be the source, ending a long-standing debate in the scientific community.
In addition, scientists found that the early “blood factory” actually had two different “workshops.”
They worked together, each responsible for producing different types of blood cells.
This new discovery has changed people’s understanding of early human blood formation.
Experts say this study not only answers an important question in the life sciences, but may also help doctors study early developmental abnormalities in the future, and even provide new ideas for artificially producing blood in the laboratory.