Exploring the Excretory System: Waste Removal for a Healthy Body Basic Science Primary 5 Third Term Lesson Notes Week 10

Subject: Basic Science
Class: Primary 5
Term: Third Term
Week: 10
Topic: Excretory System
Sub-topic: Understanding the meaning and organs involved
Duration: 45 minutes

Behavioural Objectives:

• Students will be able to define the excretory system.
• Students will identify the organs involved in the excretory system and their functions.

Learning Resources and Materials:

• Whiteboard and markers
• Pictures or diagrams of the kidneys, skin, liver, and large intestine
• Chart showing the functions of each organ
• Worksheets or handouts on the excretory system

Building Background/Connection to Prior Knowledge:

• Review with students what they already know about waste removal from the body, such as going to the toilet and sweating.
• Discuss the importance of keeping our bodies clean and healthy.

Embedded Core Skills:

• Observation: Identifying organs in diagrams.
• Communication: Explaining the functions of each organ.
• Critical Thinking: Understanding the importance of waste removal for overall health.

Content:

Excretory System:

1. Meaning of excretory system:
   • The excretory system removes waste products from our bodies.
2. Organs involved in the excretory system and their functions:
   • Kidneys: Filter waste from the blood to make urine. 🥤
   • Skin: Releases sweat, which contains waste products. 💧
   • Liver: Processes waste and produces bile to break down fats. 🍔
   • Large intestine: Absorbs water and eliminates solid waste as feces. 🚽

Understanding the excretory system helps us stay healthy by removing waste from our bodies! 🌟

Evaluation :

1. The excretory system removes waste products from our __________. a) Heart b) Blood c) Brain d) Stomach
2. The organs involved in the excretory system include the __________. a) Heart and lungs b) Liver and spleen c) Kidneys and skin d) Brain and stomach
3. What is the main function of the kidneys in the excretory system? a) Producing bile b) Filtering waste from the blood c) Absorbing water d) Producing sweat
4. The skin releases __________, which contains waste products. a) Urine b) Bile c) Sweat d) Saliva
5. The liver processes waste and produces __________ to break down fats. a) Urine b) Bile c) Sweat d) Saliva
6. The large intestine absorbs water and eliminates solid waste as __________. a) Blood b) Sweat c) Urine d) Feces
7. What is the meaning of the excretory system? a) Removes waste products from the body b) Filters oxygen from the air c) Produces energy for the body d) Sends messages to the brain
8. Which organ in the excretory system filters waste from the blood? a) Lungs b) Liver c) Kidneys d) Stomach
9. What does the skin release as part of the excretory system? a) Urine b) Bile c) Sweat d) Saliva
10. What is the role of the liver in the excretory system? a) Producing bile to break down fats b) Filtering waste from the blood c) Absorbing water d) Producing urine
11. The large intestine absorbs __________ and eliminates solid waste as feces. a) Nutrients b) Oxygen c) Water d) Energy
12. Which organ in the excretory system is responsible for producing bile? a) Kidneys b) Skin c) Liver d) Large intestine
13. What does the excretory system remove from the body? a) Oxygen b) Waste products c) Nutrients d) Blood
14. What is the primary function of the kidneys in the excretory system? a) Absorbing water b) Producing sweat c) Filtering waste from the blood d) Producing bile
15. The excretory system helps the body stay healthy by __________ waste products. a) Retaining b) Eliminating c) Producing d) Storing

Class Activity Discussion :

1. What is the excretory system?
   • The excretory system removes waste from our bodies.
2. Which organs are involved in the excretory system?
   • The kidneys, skin, liver, and large intestine are part of the excretory system.
3. What is the main function of the kidneys?
   • The kidneys filter waste from the blood to make urine.
4. How does the skin contribute to the excretory system?
   • The skin releases sweat, which contains waste products.
5. What role does the liver play in the excretory system?
   • The liver processes waste and produces bile to break down fats.
6. What does the large intestine do in the excretory system?
   • The large intestine absorbs water and eliminates solid waste as feces.
7. Why is the excretory system important for our bodies?
   • It helps remove harmful waste and keeps our bodies healthy.
8. How does sweat help in the excretory process?
   • Sweat removes excess heat and waste from our bodies through the skin.
9. What happens if the kidneys don’t function properly?
   • Waste products can build up in the blood, causing health problems.
10. What are some factors that can affect the excretory system?
    • Dehydration, poor diet, and certain diseases can affect how well it works.
11. How does the liver help with digestion and excretion?
    • The liver produces bile, which helps break down fats and remove waste.
12. What happens to waste products once they’re removed from the body?
    • Waste products are eliminated through urine, sweat, and feces.
13. Can the excretory system be affected by lifestyle choices?
    • Yes, unhealthy habits like smoking or not drinking enough water can affect it.
14. How can we keep our excretory system healthy?
    • Drinking plenty of water, eating a balanced diet, and staying active can help.
15. What is the connection between the excretory system and overall health?
    • A healthy excretory system helps maintain the balance of chemicals in our bodies and supports overall well-being.

Presentation:

1. Introduction (5 minutes):
   • Greet the students and recap briefly on the previous lesson.
   • Understanding Body Image and Self-Esteem: Key Concepts for Primary 5 Basic Science Third Term Lesson Notes Week 9
   • Introduce the topic of the excretory system and its importance in keeping our bodies healthy.
2. Definition of the Excretory System (5 minutes):
   • Explain that the excretory system is the body’s way of removing waste products to keep us healthy.
   • Use simple language and examples to ensure understanding.
3. Organs Involved and Their Functions (15 minutes):
   • Present each organ involved in the excretory system: kidneys, skin, liver, and large intestine.
   • Show pictures or diagrams of each organ and discuss their functions:
     • Kidneys: Filter waste from the blood to make urine.
     • Skin: Releases sweat, which contains waste products.
     • Liver: Processes waste and produces bile to break down fats.
     • Large intestine: Absorbs water and eliminates solid waste as feces.
4. Teacher’s Activities (10 minutes):
   • Engage students in discussions about the functions of each organ.
   • Ask questions to ensure understanding and encourage participation.
5. Learners’ Activities (10 minutes):
   • Students work in pairs or small groups to complete worksheets or activities related to the excretory system.
   • Encourage them to discuss and share their answers with the class.
6. Assessment (5 minutes):
   • Ask students to identify the functions of the organs involved in the excretory system.
   • Review their responses and provide feedback.
7. Ten Evaluation Questions:
   1. What is the excretory system?
   2. Name one organ involved in the excretory system.
   3. What is the function of the kidneys?
   4. What does the skin release as part of the excretory process?
   5. What does the liver produce to break down fats?
   6. What happens in the large intestine?
   7. Why is the excretory system important for our health?
   8. How does sweat help in waste removal?
   9. What can affect the excretory system?
   10. How can we keep our excretory system healthy?
8. Conclusion (5 minutes):
   • Summarize the main points of the lesson.
   • Emphasize the importance of the excretory system in maintaining good health.
9. Homework:
   • Assign a simple worksheet or activity related to the excretory system for students to complete at home.

Note: Adapt the lesson plan as needed based on the pace and understanding of the students.