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Strong staining for bFGF was also found in cardiac muscle fibers , smooth muscle cells of mid - size blood vessels , the gut and the myometrium , in central nervous system neurons and cerebellar Purkinje cells , and on epithelial cells of the bronchi , colon , endometrium , and sweat gland ducts of the skin .
 cardiac muscle fibers, smooth muscle cells, blood vessels, gut, myometrium, central nervous system neurons, cerebellar Purkinje cells, epithelial cells, bronchi, colon, endometrium, sweat gland ducts, skin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 cardiac muscle fibers, smooth muscle cells, blood vessels, gut, myometrium, central nervous system neurons, cerebellar Purkinje cells, epithelial cells, bronchi, colon, endometrium, sweat gland ducts, skin