“…why is it able to keep blood and organs in it?”
This is actually a two part question.
The first part of your question: “why?”
This is a question humans have been asking since the dawn of time, and it is unlikely that we can really ever answer that question. I don’t feel qualified, so i won’t try.
The second part of your question: “is it able to keep blood and organs in it?’l”
Yes.
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