no it is not. the pharynx, stomach, and intestinal tract are not sterile.
A Low PH of 2 precudes Life [in all of It's forms].
distal urethra
the flower is sterile
If a sterile field becomes "contaminated" with a sterile solution, the field remains sterile.
sterile gloves
due to its high acid level the stomach is normally quite sterile with very little bacteria. The bacteria which is known to cause ulcers is helicobacter pylori, also known as H.pylori.
sterile
This definition is only one or the other. Either sterile or non-sterile. There is no such thing as partially sterile.
Sterile is clean and clean is sterile, so both
Are mucous membranes sterile
sterile