from The Century Dictionary.
- noun In anatomy, a fibrous cord extending from the fundus of the bladder to the umbilicus.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Anat.) A cord or band of fibrous tissue extending from the bladder to the umbilicus.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun anatomy A
bandof fibrous tissueextending from the bladderto the umbilicus.
from Wiktionary, Creative Commons Attribution/Share-Alike License
The lowest part of the allantoic pedicle (or the "urachus") remains hollow, and forms the bladder.
It also has a narrow canal (the urachus) which serves to remove the urine of the foetus; in fact the subsequently formed bladder takes its origin from a dilation of the urachus.
In this disease, inflammation of the joints and open urachus are almost always co-existent.
TREATMENT: In the treatment of this disease, we have to attend to constitutional disturbances, inflamed joints, open urachus and complications such as constipation and diarrhoea.
Occasionally foals two or three months old which have the urachus closed and are in an apparently healthy condition contract this disease in a form of painful swelling of the joints.
In very rare cases open urachus may exist without any joint inflammation.
As examples of the former may be mentioned that in which the organ is deficient in front, and has become everted and protruded like a fungous mass through an opening at the median line of the hypogastrium; that in which the rectum terminates in the bladder posteriorly; and that in which the foetal urachus remains pervious as a uniform canal, or assumes a sacculated shape between the summit of the bladder and the umbilicus.
The vertex of the bladder is joined to the umbilicus by the remains of the urachus which forms the middle umbilical ligament, a fibromuscular cord, broad at its attachment to the bladder but narrowing as it ascends.
The remainder of the vesico-urethral portion forms the body of the bladder and part of the prostatic urethra; its apex is prolonged to the umbilicus as a narrow canal, which later is obliterated and becomes the medial umbilical ligament (urachus).
There is a case described 6.328 of a man who evidently suffered from a patent urachus, as the urine passed in jets as if controlled by a sphincter from his umbilicus.