Microorganisms to Cells

Emerging evidence is linking brain health to the virome and microbiome, especially those located in the GI tract or gut. The numbers if microorganisms in the human body are, of course, uncountable. It used to be estimated that there were ten microorganisms in the average human body to every one cell. However, that number may well fall into the category of an urban legend. Research reported in the National Geographic Magazine (Weizmann Institute of Science) indicated the average human male is composed of about 30 trillion cells. His body also contains about 40 trillion bacteria, most of which reside in his digestive tract. “Regardless of the exact numbers, the microbiome remains a vital, underrated contributor to human health … It’s really easy to forget that we live in a microbial world. They’re emperors of our planet.”

https://www.nationalgeographic.com/news/2016/01/160111-microbiome-estimate-count-ratio-human-health-science/#close