Lesson Notes By Weeks and Term - Senior Secondary 1

Cells and tissues of human body

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TERM – 1ST TERM

WEEK THREE

Class: Senior Secondary School 1

Age: 15 years

Duration: 40 minutes of 5 periods each

Date:

Subject: HEALTH EDUCATION

Topic: CELLS AND TISSUES OF HUMAN BODY

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

I.) Define a cell

II.) Identify the features of a cell.

III.) Define tissues

IV.) Differentiate growth from development.

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 meaning and function of the cell and tissues and identify their features.

Students listens attentively to the teacher                                                                          

STEP 2

EXPLANATION

Teacher discuss the differences between growth and development.

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

CELLS AND TISSUES OF HUMAN BODY

The Cell

The cells of the human body are incredibly diverse in terms of size, shape, and function. They are the basic structural and functional units of life. Human cells can be broadly categorized into several types based on their specialized functions, such as nerve cells (neurons), muscle cells (myocytes), skin cells (keratinocytes), blood cells (erythrocytes, leukocytes), and many others.

Despite their diversity, all human cells share some common features:

  1. Plasma membrane: Surrounds the cell, acting as a barrier and controlling the passage of substances in and out of the cell.
  2. Cytoplasm: Gel-like substance inside the cell where organelles are suspended and chemical reactions take place.
  3. Nucleus: Contains the cell's genetic material (DNA), which controls cellular activities and hereditary information.
  4. Organelles: Specialized structures within the cell that perform specific functions, such as mitochondria (energy production), endoplasmic reticulum (protein synthesis), Golgi apparatus (protein processing), and lysosomes (waste disposal).
  5. Cytoskeleton: Provides structural support, helps maintain cell shape, and facilitates cell movement.

Tissue

Tissues are groups of cells with similar structure and function that work together to perform specific tasks in the body. There are four primary types of tissues in the human body:

  1. Epithelial Tissue: Forms the lining of internal and external surfaces of organs and cavities. It serves as a protective barrier, regulates the passage of substances, and can be specialized for secretion or absorption.
  2. Connective Tissue: Provides support and connects different structures in the body. It includes a variety of cells embedded in an extracellular matrix composed of protein fibers and ground substance.
  3. Muscle Tissue: Composed of cells called muscle fibers that contract to produce movement.
  4. Nervous Tissue: Consists of nerve cells called neurons and supporting cells called glial cells. Nervous tissue is responsible for transmitting electrical signals throughout the body.

Differences between Growth and Development .

The differences between growth and development:

Growth

Development

 It's physical quantitative changes in size or mass   

 It's a qualitative and quantitative changes in structure, function, and behavior

It's an increase in physical dimensions (size, weight, volume)

It is Maturation, differentiation, specialization     

It is quantifiable, measurable parameters (height, weight

It is multidimensional, includes physical, cognitive, emotional, and social aspects

It's increase in size, mass, or number of cells or tissues

It's requires an acquisition of new skills, abilities, and behaviors  

It's typically occurs throughout life, most rapid in early stages (childhood, adolescence)

It's progresses through distinct stages (infancy, childhood, adolescence, adulthood)

It is genetic, nutritional, hormonal factors

It is genetic, environmental, cultural, societal factors  

EVALUATION: 1. What is a cell?

  1. Identify 4 features of the cell.
  2. In a tabular form, give 4 differences between growth and development

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively