Class: Senior Secondary School 1 (SS1, SS 1, SSS1, SSS 1)
Term: Second Term
Week: 8
Age: 15 years
Duration: 45 minutes
Subject: Physical Education
Curriculum Theme: Physical Education
Previous Lesson: The Respiratory System.
Topic: Blood Circulatory System
Subject Matter: blood circulation, composition of blood, functions of blood, pulmonary circulation, systemic circulation, differences between pulmonary and systemic circulation

Specific Objectives

By the end of the lesson, pupils should be able to:

Cognitive Domain:

Define blood circulation.
State the components of blood.
List at least three functions of blood.
Differentiate between pulmonary and systemic circulation.

Affective Domain:

Appreciate the importance of the circulatory system to human health.
Participate actively in class discussions.

Psychomotor Domain:

Accurately describe the pathway of blood in both pulmonary and systemic circulation.
Draw a simple diagram illustrating the flow of blood.

Collaborate with peers to answer questions about the circulatory system.
Ask relevant questions to clarify understanding.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum for Physical and Health Education.
State Unified Scheme of Work for Senior Secondary Schools.
Physical and Health Education for Senior Secondary Schools 1 by J.O. Amusa et al.
https://www.who.int/health-topics/circulatory-system
https://www.heart.org/en/health-topics/heart-attack/about-heart-attacks/how-the-heart-works

Instructional Materials

The teacher will teach this lesson with the aid of:

Diagrams of the human circulatory system.
Projectors and pictures showing blood components.
CD-ROMs with educational videos on blood circulation.
Physical Education textbooks.

Rationale for the Lesson

Understanding the blood circulatory system helps pupils know how blood moves through their bodies, delivering oxygen and nutrients while removing waste. This knowledge is important for maintaining good health and appreciating how the body functions.

Prerequisite/Previous Knowledge

Pupils have basic knowledge of the human body, its organs, and the importance of healthy living from their primary and junior secondary education.

Lesson Content/Board Summary

Blood Circulatory System

Blood Circulation

Blood circulation is the continuous movement of blood through the body, propelled by the heart, to deliver oxygen and nutrients to tissues and remove waste products.

Composition of Blood

Blood is a specialized body fluid composed of several key elements:

Plasma: The liquid component of blood, which suspends blood cells.
Red Blood Cells (Erythrocytes): Carry oxygen from the lungs to the body tissues and transport carbon dioxide back to the lungs.
White Blood Cells (Leukocytes): Part of the immune system, they fight infections and other diseases.
Platelets (Thrombocytes): Small, irregular-shaped clear cell fragments that stop bleeding by clumping and forming plugs in blood vessel injuries.

Functions of Blood

The blood performs several important functions in the body:

Transportation of oxygen and nutrients to body cells.
Transportation of carbon dioxide and waste products from cells.
Regulation of body temperature.
Protection against infections and diseases.
Clotting of blood to prevent excessive blood loss.

Pulmonary Circulation

Pulmonary circulation is the part of the circulatory system that carries deoxygenated blood from the heart to the lungs, and then returns oxygenated blood from the lungs back to the heart.

The pathway involves:

Deoxygenated blood leaves the right ventricle, passes through the pulmonary artery to the lungs.
In the lungs, blood picks up oxygen and releases carbon dioxide.
Oxygenated blood returns to the left atrium of the heart via the pulmonary veins.

Systemic Circulation

Systemic circulation is the part of the circulatory system that carries oxygenated blood from the heart to the rest of the body (organs and tissues), and then returns deoxygenated blood from the body back to the heart.

The pathway involves:

Oxygenated blood leaves the left ventricle, passes through the aorta to the body tissues.
In the body tissues, blood delivers oxygen and nutrients and picks up carbon dioxide and waste.
Deoxygenated blood returns to the right atrium of the heart via the superior and inferior vena cava.

Differences between Pulmonary and Systemic Circulation

The key differences between pulmonary and systemic circulation are:

Purpose: Pulmonary circulation oxygenates blood; Systemic circulation delivers oxygenated blood to the body.
Starting Point: Pulmonary starts from the right ventricle; Systemic starts from the left ventricle.
Destination: Pulmonary goes to the lungs and back; Systemic goes to the body tissues and back.
Type of Blood Carried (Arteries): Pulmonary arteries carry deoxygenated blood; Systemic arteries carry oxygenated blood.
Type of Blood Carried (Veins): Pulmonary veins carry oxygenated blood; Systemic veins carry deoxygenated blood.

Teaching Methods/Instructional Techniques

Discussion, Lecture, Demonstration, Question and Answer, Visual Aids

Instructional Procedures

Step 1: Introduction

Time: 5 minutes
Teaching Skill: Set Induction
Teacher’s Activity: The teacher greets the pupils and reviews the previous lesson briefly. The teacher then asks pupils what they think makes their heart beat and how blood moves around the body. The teacher introduces the topic: Blood Circulatory System.
Pupils’ Activity: Pupils respond to questions and listen attentively.
Learning Point: Pupils are prepared for the lesson and recall prior knowledge.

Step 2: Blood Circulation

Time: 5 minutes
Teaching Skill: Explanation/Definition
Teacher’s Activity: The teacher defines blood circulation and explains its importance in the body, using simple language and diagrams.
Pupils’ Activity: Pupils listen, take notes, and ask questions for clarification.
Learning Point: Pupils understand the meaning and purpose of blood circulation.

Step 3: Composition of Blood

Time: 8 minutes
Teaching Skill: Elaboration/Illustration
Teacher’s Activity: The teacher discusses the main components of blood (plasma, red blood cells, white blood cells, platelets) using charts or projected images to illustrate each component.
Pupils’ Activity: Pupils observe the diagrams, listen, and note down the components of blood.
Learning Point: Pupils can identify and name the different parts that make up blood.

Step 4: Functions of Blood

Time: 7 minutes
Teaching Skill: Listing/Explanation
Teacher’s Activity: The teacher explains the various functions of blood, such as transportation, regulation, and protection, providing simple examples for each. The teacher encourages pupils to suggest functions.
Pupils’ Activity: Pupils listen, contribute ideas, and write down the functions of blood.
Learning Point: Pupils understand the multiple roles blood plays in the body.

Step 5: Pulmonary Circulation

Time: 7 minutes
Teaching Skill: Demonstration/Visualisation
Teacher’s Activity: The teacher explains pulmonary circulation, tracing the path of blood from the heart to the lungs and back, using a large diagram of the circulatory system. The teacher emphasizes the exchange of gases.
Pupils’ Activity: Pupils observe the diagram, listen, and trace the path of blood in pulmonary circulation.
Learning Point: Pupils can describe how blood flows between the heart and lungs.

Step 6: Systemic Circulation

Time: 6 minutes
Teaching Skill: Demonstration/Comparison
Teacher’s Activity: The teacher explains systemic circulation, tracing the path of blood from the heart to the rest of the body and back. The teacher then highlights the key differences between pulmonary and systemic circulation.
Pupils’ Activity: Pupils observe, listen, and note the path of systemic circulation and its differences from pulmonary circulation.
Learning Point: Pupils understand systemic circulation and can distinguish it from pulmonary circulation.

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

Define blood circulation.
List any three components of blood.
State two functions of blood.
Explain the main difference between pulmonary and systemic circulation.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 2 minutes
Teaching Skill: Summarization
Teacher’s Activity: The teacher summarizes the main points of the lesson, reiterating the importance of a healthy circulatory system. The teacher assigns homework: “Draw and label a simple diagram showing the path of blood in pulmonary and systemic circulation.”
Pupils’ Activity: Pupils listen and copy the homework assignment.
Learning Point: Pupils consolidate their learning and have a task to reinforce understanding.

Lesson Keywords

Circulation – The movement of blood through the body.
Plasma – The liquid part of blood.
Red Blood Cells – Cells that carry oxygen.
White Blood Cells – Cells that fight infection.
Platelets – Cells that help blood clot.
Pulmonary – Relating to the lungs.
Systemic – Relating to the whole body.
Deoxygenated blood – Blood lacking oxygen.
Oxygenated blood – Blood rich in oxygen.

Differentiation

For pupils who grasp concepts quickly, the teacher can ask them to research common circulatory system diseases. For pupils needing more support, the teacher will use simplified diagrams, provide clearer step-by-step explanations, and offer individual assistance during note-taking or question-answering sessions.

Note for teachers using this lesson plan

Teachers should ensure that diagrams used are clear and easy to understand. Encourage pupils to ask questions and participate actively. Practical demonstrations, if possible, can enhance understanding. Emphasize real-life connections to the importance of a healthy circulatory system, such as through exercise and diet.