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Organs in animals


Organs are made of tissues. A particular organ may contain several different tissues. For example, the stomach is an organ that contains:

  • Muscular tissue - to churn the food and other contents of the stomach
  • Glandular tissue - to produce digestive juices including acid and enzymes
  • Epithelial tissue - to cover the inner and outer surfaces of the stomach

The stomach is one of the organs that form the digestive system. The stomach contains various tissues, and each tissue is made of a particular type of cell. In order of increasing size and complexity:

cells → tissues → organ (the stomach) → organ system (the digestive system)

Back to Tissues, organs and organ systems index

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