fill in the blank question\nmucous membranes secrete which coats the interior walls of structures open to…

fill in the blank question\nmucous membranes secrete which coats the interior walls of structures open to the outside and protects the body from invasion by bacteria

fill in the blank question\nmucous membranes secrete which coats the interior walls of structures open to the outside and protects the body from invasion by bacteria

Answer

Brief Explanations:

Mucous membranes secrete mucus which serves as a protective layer against bacterial invasion.

Answer:

mucus