Lesson Notes By Weeks and Term - Senior Secondary 2

TERM – 1^ST TERM

WEEK SIX

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 5 periods each

Date:

Subject: HEALTH EDUCATION

Topic: RESPIRATORY SYSTEM

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

I.) Describe the respiratory system

II.) Identify the components of the respiratory system.

III.) Identify the functions of the respiratory system.

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION	TEACHER’S ACTIVITY	STUDENT’S ACTIVITY
STEP 1 INTRODUCTION	The teacher explains the concept, respiratory system and identify the components of respiratory system.	Students listens attentively to the teacher
STEP 2 EXPLANATION	Teacher discuss the functions of the respiratory system.	Students exhibit attentiveness and active engagement
STEP 3 NOTE TAKING	The teacher writes a summarized note on the board	The students copy the note in their books

 

NOTE

RESPIRATORY SYSTEM

The respiratory system is a biological system responsible for the exchange of gases between the body and the external environment. Its primary function is to facilitate the intake of oxygen (O2) from the air and the elimination of carbon dioxide (CO2) produced by cellular metabolism.

Components of the human respiratory system

The essential components of the respiratory system include:

1. Nose and Nasal Cavities: The nose and nasal cavities act as the primary entrance for air into the respiratory system. They filter, warm, and humidify incoming air, removing particles and pathogens before it reaches the lungs.
2. Pharynx: The pharynx, or throat, serves as a common passageway for air from the nasal cavities and food from the mouth. It also plays a role in vocalization and swallowing.
3. Larynx: The larynx, or voice box, contains the vocal cords and is involved in producing sound and protecting the lower respiratory tract during swallowing.
4. Trachea: The trachea, or windpipe, is a rigid tube that connects the larynx to the bronchi. It is lined with mucous membranes and cilia that trap and remove foreign particles and pathogens from the air.
5. Lungs: The lungs are paired organs responsible for gas exchange. Each lung is enclosed within the thoracic cavity and contains millions of tiny air sacs called alveoli, where gas exchange occurs.
6. Diaphragm and Intercostal Muscles: The diaphragm and intercostal muscles are responsible for breathing.

Functions of respiratory system

The respiratory system performs several essential functions necessary for the exchange of gases between the body and the external environment. These functions include:

1. The primary function of the respiratory system is to facilitate the exchange of oxygen (O2) and carbon dioxide (CO2) between the body and the environment.
2. The respiratory system provides a pathway for oxygen to enter the body and be transported to tissues through the bloodstream.
3. In addition to supplying oxygen, the respiratory system eliminates carbon dioxide, a byproduct of cellular metabolism, from the body.
4. The respiratory system helps regulate the pH balance of body fluids by controlling the levels of carbon dioxide in the blood.
5. The respiratory system helps protect the body against pathogens, such as bacteria, viruses, and other microorganisms, by filtering, warming, and humidifying inhaled air in the nasal passages.

EVALUATION: 1. What is respiratory system.

2. Identify 5 components of the respiratory system and state their roles.
3. Mention 5 functions of the respiratory system.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively