For children in Grade 5 learning about life systems 

From the Curriculum:

Students will also develop an understanding of the importance of proper nutrition and exercise to the healthy functioning of organ systems. Choices in their lives about their bodies may have lifelong effects. Students will learn the location, structure, and function of the major organs of the respiratory, circulatory, and digestive systems.

Big Ideas:

• Organ systems are components of a larger system (the body) and, as such, work together and affect one another.
• Organ structures are linked to their functions.
• Systems in the human body work together to meet our basic needs.
• Choices we make affect our organ systems and, in turn, our overall health.