The rim where the lining of the cervical canal (made up of column shaped cells) meets the flat cells of the fave of the cervix. If the column shaped squamous cells grow outside of the cervical canal, they form a visible red circle around the os.
The rim where the lining of the cervical canal (made up of column shaped cells) meets the flat cells of the fave of the cervix. If the column shaped squamous cells grow outside of the cervical canal, they form a visible red circle around the os.
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