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the remains of digestion, which are eliminated from the body via the anus, and contain undigested food and bile pigments.
the replacement of liver tissue by scar tissue due to damage to liver cells caused by excessive...
an international agreement to phase out the use of CFCs, signed by 49 countries in Montreal,...
the cartilaginous flap at the top of the mammalian trachea, which closes off the entrance to the...
an infectious disease that can be spread or transmitted from one person to another.
tissues that are responsible for the transport of substances within the plant.