Tissues also cluster in our body. A grouping of interacting tissues forms an organ.

The stomach, for example, is an organ of the human body. In it we can recognize the presence of epithelial and muscle tissue, among others.

Scheme showing the various organs of our body


Various organs interact in the human body, performing a certain function in the body. This set of associated organs forms a system.

The human digestive system, for example, acts in the process of taking advantage of ingested foods. This system is formed by the mouth, pharynx, esophagus, stomach, small intestine and large intestine. In addition to these organs, the human digestive system comprises attached glands such as the salivary glands, the pancreas and the liver. Systems work in an integrated manner, and this integration is critical to maintaining the health of the organism as a whole and, consequently, life.

Scheme of the respiratory system.

Summing up

In our body it is possible to identify different levels of organization that act in the vital processes. We can summarize this organization through the following scheme:

Cells -> tissues -> organs -> systems -> organism