Answer:
oxygen is taken into the lungs and exchanged for carbon dioxide which is exhaled
I think the Hagfish habitat is limited by the salinity of the environment. Hagfish are the most pleisiomorphic extant craniates, and based on the similarity of ionic concentrations between their internal milieu and sea water, they have long referred as a model for osmo- and ionoconformation.
The answer is true, the properties of carbons do make it the backbone of molecules that form living matter.
