Mesothelium: the layer of flat cells, derived from the mesoderm, that line the coelom or body cavity of the embryo. In the adult, it forms the simple squamous epithelium that covers all true serous membranes (peritoneum, pericardium, pleura). [ Dorlands_Medical_Dictionary:MerckMedicus ]

This is just here as a test because I lose it

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has obo namespace

BrendaTissueOBO

id

BTO:0003155

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