这个数字问题好说,看论文就行。 英文论文链接:
https://journals.plos.org/plosbi ... ournal.pbio.1002533
Revised Estimates for the Number of Human and Bacteria Cells in the Body
Ron Sender,Shai Fuchs ,Ron Milo
Published: August 19, 2016 https://doi.org/10.1371/journal.pbio.1002533
Abstract
Reported values in the literature on the number of cells in the body differ by orders of magnitude and are very seldom supported by any measurements or calculations. Here, we integrate the most up-to-date information on the number of human and bacterial cells in the body. We estimate the total number of bacteria in the 70 kg "reference man" to be 3.8·10^13. For human cells, we identify the dominant role of the hematopoietic lineage to the total count (≈90%) and revise past estimates to 3.0·10^13 human cells. Our analysis also updates the widely-cited 10:1 ratio, showing that the number of bacteria in the body is actually of the same order as the number of human cells, and their total mass is about 0.2 kg. |