Bio week 7 and weapon systems midterm equations

8th-Semester-Spring-2025/biology/week-7/prelab-project-7/prelab-project-7.md

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+Video "Lung Function"
+
+### 4 volumes:
+- Tidal volume: 500-750ml and is the amount of air normally breathed in and out
+- Inspiratory reserve volume: The difference in the total volume of air inspired with maximum inspiratory effort compared to the tidal volume. Typically about 3L.
+- Expiratory reserve volume: The amount of air that can be exhaled in addition to the tidal volume. Typically about 1.5L.
+- Residual volume: The amount of air remaining in the lungs after maximum expiratory effort. Typically about 1L.
+
+### Lung capacities:
+- Total lung capacity: the sum of the four lung volumes (about 6L).
+
+### Question:
+Why can we not breathe out all the air in our lungs?