Although the urethra, urinary bladder, and ureters are each protected by a mucous membrane, bacteria and viruses are sometimes able to gain entry into the internal organs through a body opening which is called a

+1 vote

 

nephron

meatus

duct

renal column

 

asked Dec 13, 2012 in Health Sciences by MedicalTerm ~Expert~ (3,354 points)
    

1 Answer

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meatus
answered Dec 13, 2012 by MedicalTerm ~Expert~ (3,354 points)

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