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→Disruption of blood circulation
|DOI=10.7860/JCDR/2015/14972.6860
|accessdate=2022-02-20
}}</ref> The frenular artery supplies arterial blood to to the [[glans penis]], so the excision of the frenulum reduces the supply of arterial blood to the glans penis.
Circumcision also disrupts the return flow of blood to the heart. Veins in the prepuce provide "at least part of the drainage of the glans surface."<ref name="mcgrath2001">{{REFbook