Anatomical site | Organ | Cellular source |
---|---|---|
Respiratory tract/oropharynx/nasopharynx | Lung | Alveolar type II cell, non-ciliated bronchiolar cells |
 | Trachea and bronchi | Submucosal glands and repiratory epithelial cells |
 | Lacrimal glands | Ductal epithelial cells |
 | Salivary gland | Ductal epithelial cells |
 | Eustachian tube | Squamous epithelium |
Gastrointestinal tract | Esophagus | Squamous epithelium |
 | Stomach | Glandular epithelial cells |
 | Small intestine | Mucosal epithelial cells |
 | Pancreas (exocrine) | Ductal epithelial cells (and islets) |
 | Biliary tract | Intrahepatic ductal epithelial cells |
Genitourinary tract | Prostate | Glandular epithelium |
 | Bladder | Transitional epithelium |
 | Kidney | Collecting duct epithelium |
 | Uterus | Endometrium/endocervical epithelium? |
 | Fetal membranes | ? |
Skin and soft tissue | Cutaneous squamous epithelium | Squamous epithelium |
 | Sweat glands | Ductal epithelium |
 | Sebaceous glands | Glandular epithelium |
 | Breast | Mammary epithelium |
 | Mesentery | ? |
Other | Heart | ? |
 | Brain | ? |
 | Testis | Leydig cells |
 | Pancreas (endocrine) | Islets |
 | Placenta | ? |