Learning Activity Sheets Grade 9 Science (Biology) First Quarter

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Learning Activity Sheets Grade 9 Science (Biology) First Quarter

The document provides information about the human respiratory and circulatory systems. It describes the major parts of the respiratory system, including the nose, mouth, lungs, trachea, bronchi, and alveoli. It explains the processes of external respiration in the lungs and…

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Uploaded: July 31, 2025

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