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 internal respiration in cells. It also outlines the phases of breathing including inspiration and expiration. Additionally, it summarizes the key...

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 internal respiration in cells. It also outlines the phases of breathing including inspiration and expiration. Additionally, it summarizes the key components of the circulatory system including the heart, blood vessels, blood, and the three main types of circulation.