Science 9 Module 1: Respiratory and Circulatory System

Introductory Information

• Mode: Alternative Delivery
• Focus: Respiratory and Circulatory Systems
• Learning Objective: Explain how these systems work together to transport nutrients, gases, and other molecules.

Key Learning Outcomes

1. Identify and describe the parts and functions of the breathing system.
2. Explain lung function and diaphragm movement.
3. Identify circulatory system components and types of circulation.
4. Explain heart function and the interplay between respiratory and circulatory systems.

Pre-Test Knowledge Checks

Sample Questions

• Exchange processes and respiratory structures.
• Function of lungs and order of airflow.
• Differences between arteries and veins.

Lesson Content

Respiratory System

• Function: Delivers oxygen to the body and removes carbon dioxide.
• Key Components: Nasal Cavity, Pharynx, Larynx, Trachea, Bronchi, Lungs
  • Nose/Mouth: Entry point, filters air.
  • Pharynx/Larynx: Pathway and voice production.
  • Trachea/Bronchi: Air transport and branching into bronchioles.
  • Lungs: Oxygen transfer to blood through alveoli.
• Mechanism of Breathing
  • Inhalation: Diaphragm contracts, lungs expand.
  • Exhalation: Diaphragm relaxes, air expelled.

Circulatory System

• Function: Transports oxygen/nutrients and removes carbon dioxide.
• Key Components: Heart, Blood, Blood Vessels
  • Heart: Muscular pump moving blood.
  • Blood: Composed of plasma, red and white cells, platelets.
  • Blood Vessels: Arteries, veins, capillaries.
  • Types of Circulation: Pulmonary, Systemic, Coronary.

System Interdependence

• Collaboration: Respiratory and circulatory systems work together to maintain homeostasis, adjusting to activity levels.

Activities and Assessments

• Mix and match respiratory system parts.
• Order pathways of oxygen and blood flow.
• Assess understanding through quizzes and activities.

Additional Learning Activities

• Sequence air and blood flow processes.
• Apply knowledge to everyday situations (e.g., blushing, temperature response).

Assessment Questions

1. Identify respiratory organs.
2. Explain diaphragm function during breathing.
3. Detail what occurs if the epiglottis fails.
4. Describe gas exchange in the lungs.
5. Define pathways of blood flow and circulation types.

Conclusion

• Complete exercises to reinforce learning.
• Use assessments to gauge comprehension and retention.

Note:

• Ensure honesty while using answer keys.
• Consult teachers for clarity and assistance.