Human Organ System
T he body is composed of cells and extracellular materials that are organized into tissues, organs, and organ systems. Many scientists divide the body into 11 separate organ systems: muscular, skeletal, circulatory, respiratory, digestive, urinary, endocrine, nervous, integumentary, reproductive, and immune . Respiratory System Respiratory system is the network of organs and tissues that help you breathe . This system helps your body absorb oxygen from the air so your organs can work. It also cleans waste gases, such as carbon dioxide, from your blood. Common problems include allergies, diseases or infections. Parts of the Respiratory System. Nose. ...

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