▁the ▁bra ch ial ▁ar tery , ▁where ▁standard ▁blood ▁pressure ▁cu ff s ▁measure ▁pressure , ▁is ▁< 1 2 0 / 8 0   mm H g . ▁Other ▁major ▁ar ter ies ▁have ▁similar ▁levels ▁of ▁blood ▁pressure ▁record ings ▁indicating ▁very ▁low ▁dispar ities ▁among ▁major ▁ar ter ies . ▁In ▁the ▁inn omin ate ▁ar tery , ▁the ▁average ▁reading ▁is ▁ 1 1 0 / 7 0   mm H g , ▁the ▁right ▁sub c lav ian ▁ar tery ▁aver ages ▁ 1 2 0 / 8 0 ▁and ▁the ▁ab dom inal ▁a ort a ▁is ▁ 1 1 0 / 7 0   mm H g . ▁The ▁relatively ▁uniform ▁pressure ▁in ▁the ▁ar ter ies ▁indicate ▁that ▁these ▁blood ▁vessels ▁act ▁as ▁a ▁pressure ▁res er voir ▁for ▁flu ids ▁that ▁are ▁transport ed ▁within ▁them . ▁ ▁Press ure ▁dro ps ▁gradually ▁as ▁blood ▁flows ▁from ▁the ▁major ▁ar ter ies , ▁through ▁the ▁ar ter i oles , ▁the ▁cap ill aries ▁until ▁blood ▁is ▁pushed ▁up ▁back ▁into ▁the ▁heart ▁via ▁the ▁ven ules , ▁the ▁ve ins ▁through ▁the ▁v ena ▁c ava ▁with ▁the ▁help ▁of ▁the ▁mus cles . ▁At ▁any ▁given ▁pressure ▁drop , ▁the ▁flow ▁rate ▁is ▁determined ▁by ▁the ▁resistance ▁to ▁the ▁blood ▁flow . ▁In ▁the ▁ar ter ies , ▁with ▁the ▁absence ▁of ▁dise ases , ▁there ▁is ▁very ▁little ▁or ▁no ▁resistance ▁to ▁blood . ▁The ▁vessel ▁diameter ▁is ▁the ▁most