The respiratory system . The resportiory system
does not work with any other systems
removes carbon dioxide from the body
supplies the body with oxygen
includes the lungs
does not need blood to work

The respiratory system includes the lungs and supplies the body with oxygen. It also removes carbon dioxide from the body.

1)

i))the process of preparing food by green plants in the presence of sunlight is called photosynthesis.

ii) leaf is the site for photosynthesis.

iii) it takes place as,

6h2o+6co2=c6h12o6+602