What the part of the respiratory system after pharynx?

𝙠𝙚𝙚𝙥 𝙮𝙤𝙪𝙧𝙨𝙚𝙡𝙛 𝙚𝙣𝙘𝙤𝙪𝙧𝙖𝙜𝙚𝙙