JHS3 Science · Term 2 Week 1: The Human Body System

Lesson notes

Learning Objectives

Indicator: B9.3.1.1.2 - Explain the concept of respiration and show how the respiratory and circulatory systems complement each other.

By the end of the lesson, learners can:

define respiration as a chemical reaction that releases energy from glucose using oxygen, producing carbon dioxide and water as waste products.
write the word equation for respiration: glucose + oxygen → carbon dioxide + water + energy.
distinguish between breathing (the physical movement of air in and out of the lungs) and respiration (the chemical reaction inside cells).
trace the pathway of oxygen from the air into the blood and then to body cells, and trace the pathway of carbon dioxide from cells back to the lungs.
explain how the respiratory and circulatory systems work together to supply oxygen to cells and remove carbon dioxide from them.

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Curriculum details

Strand: Systems (Strand 3)
Sub-strand: The Human Body System (3.1)
Content standard: B9.3.1.1 - Demonstrate understanding of the blood circulatory system, health problems associated with the system and its relationship with the respiratory system in humans
Indicator: B9.3.1.1.2 - Explain the concept of respiration and show how the respiratory and circulatory systems complement each other. (Note that respiration is a chemical reaction that releases carbon dioxide (CO 2 ), water (H 2 O) and energy from glucose and oxygen).
Suggested placement: Term 2, Week 1 (Week 13 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: Science, Common Core Programme (JHS1-JHS3), 2023, p. 102
Transcribed from the official NaCCA publication. Check this page against the source.

Exemplars (from the NaCCA curriculum)

1. Explain the concept of respiration.
2. Explain how deoxygenated blood from circulation is oxygenated through inhalation for respiration to take place.