Bok

Bok — haýwanlaryň we adamlaryň anusyndan anus arkaly çykýan ýarym gaty, hamyr ýaly madda.http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&dopt=AbstractPlus&list_uids=16721701&query_hl=17&itool=pubmedhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC1810028

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