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inflammation of the lining of the bronchi and bronchiole causing them to become clogged with mucus.
a black substance that coats the lungs of a smoker, causing cancer of the respiratory tract.
modified phloem parenchyma cells that help translocate food substances in the plant.
cartilage with few collagen fibres and no elastin fibres. It reduces friction in joints,...
a small, circular opening in the exoskeleton of insects that allows air to enter the insect's...