Grade 9 Natural Sciences Summaries: Respiratory and Circulatory Systems

Respiratory System

A summary of the respiratory system that includes: processes like breathing, gas exchange and cellular respiration, function of parts of the respiratory system, direction of airflow, inhalation and exhalation, illnesses related to the respiratory system, terminology sheet.

Circulatory System

A summary of the circulatory system that includes: processes like pulmonary and systemic circulation, components and function of the circulatory system, anatomy of the heart and the function of the heart in the circulatory system, blood flow in the circulatory system, health issues related to circulatory system, terminology.