Imibhobho yokuhamba kwegazi

Umbhobho wegazi yityhubhu engumthambo ethwala igazi xa lihamba lijikeleza umzimba. Imithambo yegazi ethatha igazi entliziyweni ingoonothumela. Ize imithambo yegazi ebuyisela igazi entliziyweni ibengoonobuyisa. Imithambo ezii-Capillaries yona iphakathi koonobuyisa noonothumela kwaye ezi-capillaries zondla igazi nge-tissue.  

Intliziyo xa idibene nayo yonke imithambo esemzimbeni ibizwa ngokuba yi-circulatory system. igazi lihamba ngokumpompa kwentliziyo lize lithwale ioksijini liyise kwii- tissues. 

Isenzo sokuya ivuleka imithambo yegazi sibizwa ngokuba yi-vasodilation, oku kwenzeka kunceda ukuba umzimba ukwazi ukugxotha amandla obushushu  (igama elingu-vas- ngesiLatini lithetha ukuthi  "isitya sokukhongozela" okanye "isikhongozeli").
Ukwakheka kwemithambo yegazi kubizwa ngokuba yi-vasoconstriction, inqanda ukuba umzimba ungaphulukani nobushushu.  

 Amaphepha anenxaxheba kweli nqaku