Kananjalo, eyona mibhobho yegazi yakha yamincinane yimithanjana eyaziwa ngokuba zii-capillaries. Ii-systemic arterioles zijika zingene kwii-capillaries. Igazi elikwii-arterioles liziphokozela kwii-capillaries. Kulapho ke i-oksijini nezakha-mzimba zithi ziphume khona egazini zingene kwi-tissue ejikeleze ii-capillaries. Kwakhona eli gazi naloo lichola-chola ikhabhorndioxide enokugcola kwegazi okuvela kwi-tissue okanye emzimbeni. Ubuxhaka-xhaka bee- capillaries ezisa igazi kule ndawo kuthiwa yi-capillary bed.