what is the respiratory system
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The respiratory system is a biological system consisting of specific organs and structures used for gas exchange in animals and plants. The anatomy and physiology that make this happen varies greatly, depending on the size of the organism, the environment in which it lives and its evolutionary history.
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ᴛʜᴇ ʀᴇsᴘɪʀᴀᴛᴏʀʏ sʏsᴛᴇᴍ ɪs ᴀ ʙɪᴏʟᴏɢɪᴄᴀʟ sʏsᴛᴇᴍ ᴄᴏɴsɪsᴛɪɴɢ ᴏғ sᴘᴇᴄɪғɪᴄ ᴏʀɢᴀɴs ᴀɴᴅ sᴛʀᴜᴄᴛᴜʀᴇs ᴜsᴇᴅ ғᴏʀ ɢᴀs ᴇxᴄʜᴀɴɢᴇ ɪɴ ᴀɴɪᴍᴀʟs ᴀɴᴅ ᴘʟᴀɴᴛs. ᴛʜᴇ ᴀɴᴀᴛᴏᴍʏ ᴀɴᴅ ᴘʜʏsɪᴏʟᴏɢʏ ᴛʜᴀᴛ ᴍᴀᴋᴇ ᴛʜɪs ʜᴀᴘᴘᴇɴ ᴠᴀʀɪᴇs ɢʀᴇᴀᴛʟʏ, ᴅᴇᴘᴇɴᴅɪɴɢ ᴏɴ ᴛʜᴇ sɪᴢᴇ ᴏғ ᴛʜᴇ ᴏʀɢᴀɴɪsᴍ, ᴛʜᴇ ᴇɴᴠɪʀᴏɴᴍᴇɴᴛ ɪɴ ᴡʜɪᴄʜ ɪᴛ ʟɪᴠᴇs ᴀɴᴅ ɪᴛs ᴇᴠᴏʟᴜᴛɪᴏɴᴀʀʏ ʜɪsᴛᴏʀʏ.
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