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cartilage with few collagen fibres and no elastin fibres. It reduces friction in joints, attaches bone to bone in ribcage and sternum, keeps tubes open, such as trachea and bronchi, and gives shape, such as the nose.
the right and left halves of bilaterally symmetrical organisms are mirror images of each other...
the part of the lung where the bronchi, bloodvessels and nerves enter and leave the lungs.
the body system concerned with the digestion and absorption of nutrients.
the seepage of acidic, contaminated water from disused mines and mine dumps.