...It may beoccasioned by roughly pulling away the umbilical cord; through kicks or blowson the belly; through any severe straining by which the sides of the navel arestretched apart... 
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...The cow often calves standing, in which case the navel string is broken asthe calf falls to the ground...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...Fetal calf with a portion of the wall of the abdominal cavity of theright side and the stomach and intestines removed to illustrate the nature ofthe umbilical or navel cord...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...This may occur in two conditions—when the cord is cut off too close tothe navel and left untied and when it tears off at the navel...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...Before birth the urine passes from the bladder by a special tube through thenavel and navel string into the outer water bag (allantois)...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...This may originate in direct, mechanical injury to the navel in calving, orshortly after, with or without the lodgment of irritant or septic matter on itslacerated or cut end...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...In cases at first closed the pus may burst out later, coming from the backpart of the navel and the swelling extending backward...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...—Prevention must begin with the purity of the buildings andthe navel, as noted in the last article...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...Umbilicus: a navel, or navel-like depression...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Twenty-six days later theturtle was still in good condition and its navel was nearly closed...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...The navel ("umbilical scar") of captive hatchlings ordinarilyclosed by the end of the second month but in three instances remainedopen more than 99 days...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...
Umbilical: pertaining to the navel (umbilicus)...
Ernst Haeckel 「The Evolution of Man」
...The origin of the navel coincides with the complete closing of the externalventral wall...
Ernst Haeckel 「The Evolution of Man」
...
With the formation of the internal navel and the closing of the alimentarycanal is connected the formation of two cavities, which we call the capital andthe pelvic sections of the visceral cavity...
Ernst Haeckel 「The Evolution of Man」
...She held it every now and then to the fire, then applied and pressed it to the navel until it cooled...
David Collins 「An Account of the English Colony in New South Wales, Vol. 1」
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