The respiratory system is responsible for the exchange of gases in the body. It is made up of the lungs, airways, and the muscles that help move air into and out of the body.
Parts of the Respiratory System
The respiratory system consists of the following parts:
Nose and nasal cavity: Warms, moistens, and filters the air as it is inhaled.
The process of respiration involves inhalation and exhalation:
Inhalation: The diaphragm contracts and moves downward, while the rib muscles contract, causing the chest cavity to expand. This creates a vacuum, and air is drawn into the lungs.
Exhalation: The diaphragm relaxes and moves upward, while the rib muscles relax, causing the chest cavity to contract. This increases the pressure in the lungs, and air is forced out.
Some common disorders of the respiratory system include asthma, bronchitis, pneumonia, and lung cancer.
Study Tips
When studying the respiratory system, it's important to focus on the functions of each part and their roles in the process of respiration. You can also create diagrams to help visualize the pathway of air through the respiratory system.
Chemistry: Students will use scientific skills and processes to explain the composition, structure, and interactions of matter in order to support the predictability of structure and energy transformations.
Structure of Matter: Provide evidence to explain how compounds are produced. (No electron transfer)
Describe how elements form compounds and molecules.
Physical and Chemical Changes: Compare compounds and mixtures based on data from investigations and research.
Use evidence from data gathered to explain why the components of compounds cannot be separated using physical properties.
Analyze the results of research completed to develop a comparison of compounds and mixtures.