Here is a possible system model for respiration:
Inputs
- Oxygen (O2) from the environment
- Nutrients (e.g. glucose) from the diet
Outputs
- Carbon dioxide (CO2) to the environment
- Water (H2O) to the environment
Storages
- Energy stored in ATP molecules
Flows
- Oxygen and nutrients enter the body and are used in the respiratory system to produce ATP and release CO2 and H2O
- ATP is used by cells to power various functions, such as muscle contraction, ion transport, and protein synthesis
Note: This is a simplified model and does not include all the details and complexities of respiration. It is meant to provide a general overview of the main inputs, outputs, storages, and flows of energy and matter in the process of respiration.