Editing Bladder (section)

===Blood and lymph supply===
The bladder receives blood by the [[vesical arteries]] and drained into a network of [[vesical veins]].<ref name="Grays2016" /> The [[superior vesical artery]] supplies blood to the upper part of the bladder. The lower part of the bladder is supplied by the [[inferior vesical artery]], both of which are branches of the [[internal iliac arteries]].<ref name="Grays2016" /> In females, the [[uterine arteries|uterine]] and [[vaginal arteries]] provide additional blood supply.<ref name="Grays2016" /> Venous drainage begins in a network of small vessels on the lower {{wt|en|lateral}} surfaces of the bladder, which coalesce and travel with the lateral ligaments of the bladder into the [[internal iliac vein]]s.<ref name="Grays2016" />

The [[lymphatic system|lymph]] drained from the bladder begins in a series of networks throughout the mucosal, muscular and serosal layers. These then form three sets of vessels: one set near the trigone draining the bottom of the bladder; one set draining the top of the bladder; and another set draining the outer undersurface of the bladder. The majority of these vessels drain into the [[external iliac lymph nodes]].<ref name="Grays2016" />