A PowerPoint presentation on epithelial tissues for class 9 students would likely cover the following topics: Introduction to epithelial tissues and their importance in the functioning of the body Overview of the different types of epithelial tissue, including simple, stratified, cuboidal, and columnar Detailed description of each epithelial tissue type, including its structure, function, and location in the body Comparison and contrast of the different epithelial tissue types Microscopy images or diagrams to illustrate the characteristics of each epithelial tissue type Examples of diseases or disorders related to epithelial tissues The role of Epithelial tissue in maintaining homeostasis The relationship between Epithelial tissue and other tissue types in the body.

1. Animal Tissues
Myself : Tanishq Jain : And Today , I will be Speaking About Epithelial Tissues and Muscular
Tissues
What We Will Be Covering Today
● What do we mean By Tissues
● What do we mean By Epithelial Tissues
● Types Of Epithelial Tissues
● Need of Epithelial Tissues
● Questions Related to it

2. What Do we Mean By Tissues
As we Know that Every Human Body Is Made Up Of Cells . Therefore : Tissues are a group of cells that
work together to perform a specific function in the body. There are four main types of tissue in the body:
epithelial, connective, muscle, and nervous tissue. Each type of tissue has its own unique properties and
functions, but they all work together to maintain the overall health of the body.
Why do we need tissues ??
Tissues are necessary for the proper functioning of the body. They allow for the division of labor and
specialization of cells, which allows for more efficient and effective performance of specific functions.
Therefore : the presence of different types of tissues in the body allows for the efficient performance of
specific functions, and the proper functioning of the body as a whole.

3. Epithelial Tissues
what do we mean by Epithelial Tissues ??
Epithelial tissue is a type of tissue that lines the surfaces of the body and organs. It
is made up of closely packed cells that form a continuous layer and acts as a barrier
between the body and the environment. Epithelial tissue has several key functions,
including protection, absorption, secretion, and transportation.

4. Why Do Human Body need Epithelial Tissue ?
The human body needs epithelial tissue for a variety of reasons. Some of the key functions that epithelial tissue performs include:
1. Protection: How ? [ As we Know That Epithelial tissue is made up of closely packed layer cells so it does not allow any external material to come inside
the body . Example : Infection , Injury etc .
2. Specialized functions: Epithelial tissue in the eye, for example, contains specialized cells that allow for the detection of light, while the epithelial tissue in
the ear contains specialized cells that help to detect sound.
3. Absorption
4. Secretion
5. Transportation
All these functions are essential for maintaining the overall health of the body. Without the presence of epithelial tissue,
the body would be unable to effectively protect itself from external harm, absorb essential nutrients, secrete necessary
substances, transport materials throughout the body, and sense the environment.

5. Types Of Epithelial Tissue
There are Several Types oF Epithelial Tissue Like :
1. Squamous Epithelial Tissue
2. Stratified Epithelial Tissue
3. Columnar Epithelial Tissue
4. Ciliated Columnar Epithelial Tissue
5. Glandular Epithelial Tissue
6. Cuboidal Epithelial Tissue
Let Us Discuss Each Of Them In Details :

6. Squamous Epithelial Tissue
● Squamous epithelial tissue is a type of epithelial tissue that is made up of flat layer of Cells
● The cells are arranged in a single layer
● Function : Protection: The flat, scale-like cells of squamous epithelial tissue form a barrier that protects
underlying tissues from external factors such as physical trauma, chemical irritation, and microorganisms.
● They Also Help in exchange of gases and other small molecules between the body and the environment.
● Squamous epithelial cells can also secrete and absorb small molecules such as hormones, enzymes and
other signaling molecules.
● Location : The inner surface of blood vessels , The lining of the esophagus , The lining of the mouth, nose
and throat:
All these functions are important for maintaining the overall health and homeostasis of the body.
Without the presence of squamous epithelial tissue, the body would be unable to
effectively protect underlying tissues, exchange gases

7. Stratified squamous Epithelial Tissue
Firstly It is a Type Of Squamous epithelial
Stratified squamous epithelial tissue is a type of epithelial tissue that is composed of multiple layers of flattened cells.
It is found in areas of the body, such as the skin, the lining of the mouth, and the esophagus .
The cells in the upper layers are constantly being shed and replaced by new cells produced in the lower layers. This
type of tissue provides a protective barrier against physical, chemical and biological insults.

8. Columnar Epithelial Tissue
Columnar epithelial tissue is a type of epithelial tissue that is composed of tall, column-shaped cells. Nucleus is
present in the bottom of the cells . These cells have a small amount of cytoplasm and a large, oval nucleus.
Location : Columnar epithelial tissue is found lining the stomach and intestines, as well as in some glands and
ducts.
Function : The function of columnar epithelial tissue is to absorb nutrients, protect the underlying tissues, and
secrete or absorb specific molecules.
At The Top Of The cells this tissue has finger like projections called Microvilli [ single : Microvillus ]

9. Ciliated Columnar Epithelial Tissue
Now , This Is Also A type of Columnar Epithelial Tissue .
Ciliated columnar epithelial tissue is a type of epithelial tissue that is composed of tall, narrow cells with cilia on their
apical (top) surface
These cells are arranged in a single layer . [ At the top they do not have Microvilli , They have Cilia ]
Location : They are Found in found lining the respiratory and reproductive tracts. [ Females ]
Function : 1. keep Trachea [ Food pipe / wind pipe ] Free From Dust and Food Particles
2. Regulate the movement of ovum from ovaries to fallopian tube
Also It consist Of goblet cell ??

10. Glandular Epithelial Tissue
It is is formed when some portion of epithelial cells fold inward and a multicellular gland is formed. This
is glandular epithelium.
It is a is a type of epithelial tissue that is specialized for the secretion and/or excretion of specific substances,
such as hormones or enzymes
Location : Glandular epithelial tissue can be found in various organs and structures throughout the body, inner
lining of glands and etc.
Function : The main function of glandular epithelial tissue is to secrete and/or excrete specific substances, such
as hormones, enzymes, and other molecules, into the surrounding tissues or into ducts that transport the
secretions to other locations in the body

11. Cuboidal Epithelial Tissue
Cuboidal epithelial tissue is a type of epithelial tissue that is composed of cube-shaped cells arranged in one or
more layers.
Location : It is found in various structures in the body such as the lining of ducts in glands, the lining of the renal
tubules, and the lining of the ovary in the reproductive system
Structure : Cuboidal epithelial cells are relatively flat and have a moderate amount of cytoplasm and nuclei.
Function : They are typically involved in the secretion and absorption of molecules and have a moderate level of
resistance to mechanical stress.
[ Note :They also give Mechanical support ]

12. Questions Related To It - QNA
Q: What is epithelial tissue?
Q: What are the main functions of epithelial tissue?
Q: What are the different types of epithelial tissue?
Q: Where is cuboidal epithelial tissue found in the body?
Q: Why there is a need of epithelial tissue?
Q: What is the main characteristic of squamous epithelial tissue?
Q: What is the main function of cuboidal epithelial tissue?
Q: How is ciliated columnar epithelial tissue different from non-ciliated columnar epithelial tissue?
Q: What is the main characteristic of columnar epithelial tissue?
Q: What is the main function of cuboidal epithelial tissue?