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| Wharton's jelly ： ウィキペディア英語版 |
Wharton's jelly
Wharton's jelly (''substantia gelatinea funiculi umbilicalis'') is a gelatinous substance within the umbilical cord also present in vitreous humor of the eyeball, largely made up of mucopolysaccharides (hyaluronic acid and chondroitin sulfate). It also contains some fibroblasts and macrophages.〔(Wharton's jelly ) in the Merriam-Webster Medical Dictionary.〕
It is derived from extra-embryonic mesoderm.
==Umbilical cord occlusion==
As a mucous tissue, it protects and insulates umbilical blood vessels. Wharton's jelly, when exposed to temperature changes, collapses structures within the umbilical cord and thus provides a physiological clamping of the cord (an average of) 5 minutes after birth.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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