How do the circulatory system and the respiratory system function together in the body? 1) The circulatory system carries carbon dioxide away from cells to be exhaled by the respiratory system and exchanges it with oxygen from the lungs to be carried back to the cells.
2)The circulatory system carries nitrogen away from cells to be exhaled by the respiratory system and exchanges it with sulfur dioxide from the lungs to be carried back to the cells.
3)The circulatory system carries oxygen away from cells to be exhaled by the respiratory system and exchanges it with carbon dioxide from the lungs to be carried back to the cells.
4)lThe circulatory system carries sulfur dioxide away from cells to be exhaled by the respiratory system and exchanges it with nitrogen from the lungs to be carried back to the cells.

hello there the answer is d

i think the answer is g1

hope i

-lavira: )

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .