Glossary

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the sheet-like muscle found below the ribcage that plays a vital role in breathing.

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a space or gap between two teeth. Many species of mammals have diastemata as a normal feature,...

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relaxation of the cardiac muscle.

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single-celled brown algae found in fresh water and seawater. They have hard, shell-like cell...

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a special kind of biological identification key which consists of sets of organised pairs of...

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