Question

How is oxygen transported in large multicultural organise like humans​

Answer 1

In multicellular organisms respiratory pigments take up oxygen from the air in the lungs and carry it to tissues which are deficient in oxygen 

Answer 2

Answer:

it is first enter our nose through process of diffusion

after that it passes through nasal pipe, larynx, wind pipe and to bronchi

after that it goes to brochiole and then to alveoli,

then to blood vessels and goes through our whole body.