Part IV of "Matter cycles": The sulfur cycle
Sulphur is one of the components that make up proteins and vitamins. Proteins consist of amino acids that contain sulphur atoms. Sulphur is important for the functioning of proteins and enzymes in plants, and in animals that depend upon plants for sulphur. Plants absorb sulphur when it is dissolved in water. Animals consume these plants, so that they take up enough sulphur to maintain their health.
A schematic representation of the sulphur cycle:
For more information on sulfur, move to the periodic chart
For more information about hydrogen sulphide in freshwater ecosystems
Back to the main page of matter cycles
To the matter cycles pollution page