The circulation of the circulatory system brings carbon dioxide filled blood to the lungs. is it the systemic or polmunary?

The circulation of the pulmonary circulatory system brings carbon dioxide filled blood to the lungs. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

i thinking chemical change

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".