A patient has low blood oxygen levels, although the patient's blood is circulating properly. Which is most likely functioning improperly

i'm not sure please help quick!!!!!!!!!!!!
the capillaries

the alveoli

the aorta

the pulmonary vein

1.exchange oxygen in the air for carbon dioxide

2.bronchial tube
3.the alveoli
4.It carries deoxygenated blood from the body to the heart.
for the respiratory and circulatory quick check

alveoli

A patient has low blood oxygen levels, although the patient's blood is circulating properly. Which is most likely functioning improperly

i'm not sure please help quick!!!!!!!!!!!!
the capillaries

the alveoli

the aorta

the pulmonary vein

I dont know either

cool thanks i guess.

Thanks Venom sooo much I have much love for you.

will you marry me :D

ty venom

Venom was 100% correct. Thanks

thanks, venom this really helped raise up Me up from an F

Thank you Venom much love

Thanks Venom