How do the lungs help us breathe? They pump oxygen through the blood vessels and carbon dioxide into the heart.
They take in oxygen as we inhale and release carbon dioxide as we exhale.
They take in oxygen as we inhale and release nutrients as we exhale.
They take in nutrients as their muscles contract and release carbon dioxide as they relax.

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Exit in which of the following passages from the text is the author's motif of displacement and separation most evident? a. "in these ways it was a typical wartime departure, full of proud smiles and half-concealed worry." b. "it upheld the army's decision to limit the movements of a racially select group of citizens." c. "once the first year's turmoil cooled down, the authorities started letting us outside…" d. "if anything made that country habitable it was the mountains themselves…"

Which word best describes the author's tone in this excerpt from "that spot" by jack london? i don’t think much of stephen mackaye any more, though i used to swear by him. i know that in those days i loved him more than my own brother. if ever i meet stephen mackaye again, i shall not be responsible for my actions. it passes beyond me that a man with whom i shared food and blanket, and with whom i mushed over the chilcoot trail, should turn out the way he did. i always sized steve up as a square man, a kindly comrade, without an iota of anything vindictive or malicious in his nature. i shall never trust my judgment in men again. why, i nursed that man through typhoid fever; we starved together on the headwaters of the stewart; and he saved my life on the little salmon. and now, after the years we were together, all i can say of stephen mackaye is that he is the meanest man i ever knew. a. excited b. ironic c. indignant d. playful

Do eilinor and marianne each end up with the best husband possible? give reasons for your answer.