______ are structural and functional unit of lungs
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✍️ ᴄᴇʟʟ ɪꜱ ᴛʜᴇ ꜱᴛʀᴜᴄᴛᴜʀᴀʟ ᴀɴᴅ ꜰᴜɴᴄᴛɪᴏɴᴀʟ ᴜɴɪᴛ ᴏꜰ ʟᴜɴɢꜱ.
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Cell is the answer
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