Lesson Notes By Weeks and Term - Senior Secondary 1
The sense organs
The sense organs
TERM – 1ST TERM
WEEK FOUR
Class: Senior Secondary School 1
Age: 15 years
Duration: 40 minutes of 5 periods each
Date:
Subject: HEALTH EDUCATION
Topic: THE SENSE ORGANS
SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to
I.) Define sense organs
II.) Identify and describe the sense organs.
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 introduces and explains the concept, sense organs. |
Students listens attentively to the teacher |
|
STEP 2 EXPLANATION |
Teacher identify and describe the functions of the 5 sense organs. |
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
THE SENSE ORGANS
Sense organs are specialized organs or structures in the body that detect stimuli from the environment and transmit sensory information to the brain, allowing organisms to perceive and respond to their surroundings. Each sense organ is specialized for detecting specific types of stimuli, such as light, sound, touch, taste, and smell.
Skin (Touch and Temperature Sensation)
The skin is the largest organ in the human body and serves as a barrier between the internal and external environments. It contains a variety of sensory receptors, including mechanoreceptors for touch, thermoreceptors for temperature, and nociceptors for pain.
- Mechanoreceptors detect mechanical stimuli such as pressure, vibration, and texture, allowing us to perceive touch and pressure sensations.
- Thermoreceptors detect changes in temperature, allowing us to sense hot and cold stimuli and regulate body temperature.
- Nociceptors detect tissue damage or potentially harmful stimuli, signaling the perception of pain.
Eye (Vision)
The eye is the organ responsible for vision, allowing us to perceive light and images from the surrounding environment. It consists of several structures, including the cornea, iris, pupil, lens, retina, and optic nerve.
- Light enters the eye through the cornea and pupil, and is focused by the lens onto the retina at the back of the eye.
- Photoreceptor cells in the retina, called rods and cones, detect light and convert it into electrical signals.
- These signals are transmitted through the optic nerve to the brain, where they are interpreted as visual images.
Ear (Hearing and Balance)
The ear is the organ responsible for hearing and balance, allowing us to detect sound waves and maintain equilibrium. It consists of three main parts: the outer ear, middle ear, and inner ear.
- The outer ear collects sound waves and directs them to the eardrum, causing it to vibrate.
- The vibrations are transmitted through the middle ear by a chain of small bones called ossicles (malleus, incus, and stapes).
- In the inner ear, the vibrations are converted into electrical signals by hair cells in the cochlea, which are then transmitted to the brain via the auditory nerve.
EVALUATION: 1. Define sense organs
CLASSWORK: As in evaluation
CONCLUSION: The teacher commends the students positively