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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.
single-celled brown algae found in fresh water and seawater. They have hard, shell-like cell...
a molecule that is converted to adenosine triphosphate (ATP) for energy storage.