TABLE 13.1 Sites That Harbor a Normal Flora Sites of normal Skin and its contiguous mucous membranes Microbiota Upper respiratory tract Gastrointestinal tract (various parts) Outer opening of urethra External genitalia Copyright o The MeGeaw-Hall Companies, Ine Permission required for reproduction or display · Vagina TABLE 13.2 Sterile(Microbe-Free)Anatomical External ear cana Sites and fluids External eye(lids, conjunctiva) All Internal Tissues and organs Heart and circulatory system Kidneys and bladder Ref Lungs Brain and spinal cord Muscles Bones Microbe-free sites Ovaries/testes Glands(pancreas, salivary, thyroid) 无菌部位、有菌部位5mus Middle and inner ear 不同部位的菌群 Internal eye Fluids Within an Organ or Tissue 表5-1,p.67 Blood Urine in kidneys, ureters, bladder Cerebrospinal fluid Saliva prior to entering the oral cavity Semen prior to entering the urethra Amniotic fluid surrounding the embryo and fetusSites of Normal Microbiota Ref Microbe-free sites 无菌部位、有菌部位 不同部位的菌群 表5-1， p.67