Abstract This module contains a video presentation of the gross pathology of a true knot in the umbilical cord of a mature placenta. The surgical pathology grossing laboratory is a rich resource for teaching medical student about the gross appearance of many pathologic processes. Dissection of freshly removed surgical specimens can reveal gross pathologic changes in exquisite and emph... https://www.kaliboat.com/product-category/pump-accessorieshydraulic-pumps-plumbingpumps-industrialhydraulics-pneumatics-pumps/