Tissues are groups of cells that work together to perform a specific function. There are four main types of tissues in animals: connective, muscle, nervous, and epithelial tissues. Connective tissues provide structure and binding, blood and bone are examples. Muscle tissues allow movement and include three types. Nervous tissues make up the central and peripheral nervous systems. Epithelial tissues cover surfaces of organs. Plants also have two main tissue types - meristematic and permanent tissues. Meristematic tissues are actively dividing and allow growth, while permanent tissues take on specific roles and functions.
The cells derived from root apical and shoot-apical meristems and cambium differentiate and mature to perform specific functions. This act leading to maturation is termed as differentiation. During differentiation, cells undergo few to major structural changes both in their cell walls and protoplasm. The living differentiated cells, that by now have lost the capacity to divide can regain the capacity of division under certain conditions. This phenomenon is termed as dedifferentiation. For example, formation of meristems – interfascicular cambium and cork cambium from fully differentiated parenchyma cells. While doing so, such meristems / tissues are able to divide and produce cells that once again lose the capacity to divide but mature to perform specific functions, i.e., get redifferentiated.
The cells derived from root apical and shoot-apical meristems and cambium differentiate and mature to perform specific functions. This act leading to maturation is termed as differentiation. During differentiation, cells undergo few to major structural changes both in their cell walls and protoplasm. The living differentiated cells, that by now have lost the capacity to divide can regain the capacity of division under certain conditions. This phenomenon is termed as dedifferentiation. For example, formation of meristems – interfascicular cambium and cork cambium from fully differentiated parenchyma cells. While doing so, such meristems / tissues are able to divide and produce cells that once again lose the capacity to divide but mature to perform specific functions, i.e., get redifferentiated.
This PPT explores the different type of plant tissue systems and their good coordination for the sake of structural and functional integrity along with other attributes.
Today i have a hand made Ms PowerPoint presentation of source of energy which can help you in your school, college PPTs or projects. it contain 15 slides fully awesome and the effects of the slides if just mind blowing. less than 1 MB.
The cells derived from root apical and shoot-apical meristems and cambium differentiate and mature to perform specific functions. This act leading to maturation is termed as differentiation. During differentiation, cells undergo few to major structural changes both in their cell walls and protoplasm. The living differentiated cells, that by now have lost the capacity to divide can regain the capacity of division under certain conditions. This phenomenon is termed as dedifferentiation. For example, formation of meristems – interfascicular cambium and cork cambium from fully differentiated parenchyma cells. While doing so, such meristems / tissues are able to divide and produce cells that once again lose the capacity to divide but mature to perform specific functions, i.e., get redifferentiated.
The cells derived from root apical and shoot-apical meristems and cambium differentiate and mature to perform specific functions. This act leading to maturation is termed as differentiation. During differentiation, cells undergo few to major structural changes both in their cell walls and protoplasm. The living differentiated cells, that by now have lost the capacity to divide can regain the capacity of division under certain conditions. This phenomenon is termed as dedifferentiation. For example, formation of meristems – interfascicular cambium and cork cambium from fully differentiated parenchyma cells. While doing so, such meristems / tissues are able to divide and produce cells that once again lose the capacity to divide but mature to perform specific functions, i.e., get redifferentiated.
This PPT explores the different type of plant tissue systems and their good coordination for the sake of structural and functional integrity along with other attributes.
Today i have a hand made Ms PowerPoint presentation of source of energy which can help you in your school, college PPTs or projects. it contain 15 slides fully awesome and the effects of the slides if just mind blowing. less than 1 MB.
A Powerpoint made for my school on the various types of Tissues within an Animal and a Plant and also describing their various functions.
Contents:
-Plant tissues
*Meristematic tissues
*Permanent tissues
*Simple permanent tissues
*Parenchyma
*Collenchyma
*Sclerenchyma
*Epidermis
*Complex permanent tissue
*Xylem
*Phloem
-Animal tissues
*Connective tissue
*Muscle tissue
*Nervous tissue
*Epithelial tissue
Special Reference to Wikepedia and Several Other Websites (Which I can't recall since I'd made this 2 years ago)
In plant anatomy, tissues are categorized broadly into three tissue systems: the epidermis, the ground tissue, and the vascular tissue. Epidermis - Cells forming the outer surface of the leaves and of the young plant body. Vascular tissue - The primary components of vascular tissue are the xylem and phloem.
slide1- introduction
slide2-Plant Tissue
Plant tissues are of two types :-
Meristematic tissue
Permanent tissue
slide3-Meristematic Tissue
Meristematic tissues continuously form a number of new cells and helps in growth and are generally made up live cells . Meristematic tissues are the group of cells that have the ability to divide. These tissues in a plant consist of small, densely packed cells that can keep dividing to form new cells. Meristems give rise to permanent tissues and have the following characteristics:
the cells are small,
the cells walls are thin,
cells have large nuclei,
vacuoles are absent or very small
there are no intercellular spaces.
Types of Meristematic Tissue
Apical Meristem:- Apical meristem is present on root apex, stem apex, leaf buds and flower buds. They are responsible for growth in length, i.e. primary growth.
Lateral Meristem: Lateral meristem is present along the side of the stem. They are responsible for growth in girth, i.e. secondary growth.
Intercalary Meristem: Intercalary meristem is present at the base of leaf or internodes. They are present on either side of the node.
slide4-Permanent Tissue [Plant Tissue]
Once the cells of meristematic tissue divide to a certain extent, they become specialized for a particular function. This process is called differentiation. Once differentiation is accomplished, the cells lose their capability to divide and the tissue becomes permanent tissue. Permanent tissues are of two types, simple permanent tissue and complex permanent tissue.
Permanent tissue gives support and are generally made up of dead cells . The cells of permanent tissues do not have the ability to divide. These cells are already differentiated in different tissue types and is now specialized to perform specific functions. They are subdivided into two groups, simple tissues consisting of cells which are more or less similar, e.g. epidermis, parenchyma, chlorenchyma, collenchyma, sclerenchyma and complex tissues consisting of different kinds of cells, e.g. xylem and phloem.
slide5-Parenchyma tissue
The cells of parenchyma have thin cell wall. They are loosely packed; with lot of intercellular spaces between them. Parenchyma makes the largest portion of a plant body. Parenchyma mainly works are packing material in plant parts. The main function of parenchyma is to provide support and to store food.
It is loosely packed and inter cellular spaces are there .
In aquatic plants , air is filled in parenchyma tissue , so they are called Arenchyma .
Parenchyma in which chlorophyll is present is called chlorenchyma .
slide6- Collenchyma tissue
In collenchyma tissue , the cells are generally elongated and are circular , oval or polygonal in cross- section. Cell wall is evenly thickened with cellulose at the corners . It is present on internodes of the plant . It is closely packed and intercellular spaces are generally absent. It is a living cell and vacuo
PowerPoint Presentation on the topic - 'Tissues'. For Class - 9th.
Created By - 'Neha Rohtagi'
I hope that you will found this presentation useful and it will help you out for your concept understanding.
Thank You!
In biology, tissue is a cellular organizational level between cells and a complete organ. A tissue is an ensemble of similar cells and their extracellular matrix from the same origin that together carry out a specific function. Broadly tissues can be classified into two major groups : Plant tissue and Animal tissue.
A plant tissue can be defined as a cell or a group of cells dividing, to give rise to large number of cell, which is collectively referred as tissues. They are structurally and functionally similar to these cells. Plants do have a higher level of structure called plant tissue systems. A plant tissue system can be defined as a functional unit, which connects all organs of a plant. Like animal tissue system, plant tissue system is also grouped into various tissues based on their functions.
In this lesson you will learn about :
1) Tissues - "The Teams of Workers"
2) Types of Plant Tissues
3) Plant Tissue Systems
I hope this document is helpful to you. Please share the document with your friends if you think this will benefit them. Get ready for the next lesson. Thanks.
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Tissues
1.
2.
3. A group of cells that are similar in
structure and work together to achieve
a particular function forms a tissue.
The study of tissue is known as histology.
4.
5. The origin of the cells comprising a
particular tissue type may differ
developmentally for different
classifications of animals.
ANIMAL TISSUES are classified into four ;
Connective tissues.
Muscle tissues.
Nervous tissues.
Epithelial tissues.
6.
7. Connective tissues are fibrous tissues.
They are made up of cells separated by
non-living material, which is called
an extracellular matrix.
Connective tissue gives shape to organs
and holds them in place.
Both blood and bone are examples of
connective tissue.
8. Muscle cells form the active contractile
tissue of the body known as muscle
tissue .
Muscle tissue functions to
produce force and cause motion,
either locomotion or movement within
internal organs.
9. Muscle tissue is separated into three
distinct categories: visceral or smooth
muscle, skeletal muscle and cardiac
muscle .
They are the longest group of cells in the
human body.
10. Visceral or smooth muscle, which is
found in the inner linings of organ .
11. skeletal muscle, which is found attached
to bone providing for gross movement.
12. cardiac muscle which is found in
the heart, allowing it to contract and
pump blood throughout an organism.
13. Cells comprising the central nervous
system and peripheral nervous
system are classified as neural tissue.
In the central nervous system, neural
tissue forms the brain and spinal
cord and, in the peripheral nervous
system forms the cranial
nerves and spinal nerves, inclusive of
the motor neurons.
14.
15. The epithelial tissues are formed by cells
that cover the organ surfaces such as
the surface of the skin, the airways,
the reproductive tract, and the inner
lining of the digestive tract.
16. Plant tissues are classified into two major
types.
They are;
Meristematic tissues.
Permanent tissues.
17. Meristematic tissue consists of actively
dividing cells, and leads to increase in
length and thickness of the plant.
The primary growth of a plant occurs
only in certain, specific regions, such as
in the tips of stems or roots.
It is in these regions that meristematic
tissue is present.
18.
19. Apical
•It is present at the growing tips of stems and roots and increases the length of the
stem and root.
•They form growing parts at the apices of roots and stems and are responsible for
increase in length, also called primary growth. This meristem is responsible for the
linear growth of an organ.
Lateral
•This meristem consist of cells which mainly divide in one plane and cause the organ
to increase in diameter and growth.
•Lateral Meristem usually occurs beneath the bark of the tree in the form of Cork
Cambium and in vascular bundles of dicots in the form of vascular cambium.
Intercalary
•This meristem is located in between permanent tissues.
•It is usually present at the base of node, inter node and on leaf base.
20. The meristematic tissues that take up a
specific role lose the ability to divide.
This process of taking up a permanent
shape, size and a function is
called cellular differentiation.
21. Cells of meristematic tissue differentiate
to form different types of permanent
tissue.
There are 2 types of permanent tissues:
Simple permanent tissues.
Complex permanent tissues.
22.
23. These tissues are called simple because
they are composed of similar types of
cells which have common origin and
function.
They are further classified into:
Parenchyma.
Collenchyma.
Sclerenchyma.
Epidermis.
24.
25. In plants, it consists of relatively
unspecialized cells with thin cell walls
that are usually loosely packed so that
large spaces between cells are found in
this tissue.
This tissue provides support to plants and
also stores food.
26. It is a living tissue of primary body
likeParenchyma.
Cells are thin-walled but possess thickening
of cellulose and pectin substances at the
corners where number of cells join together.
This tissue gives a tensile strength to the
plant and the cells are compactly
arranged and have very little inter-cellular
spaces.
27. This tissue consists of thick-walled, dead
cells. These cells have hard and
extremely thick secondary walls due to
uniform distribution of lignin.
Lignin deposition is so thick that the cell
walls become strong, rigid and
impermeable to water.
Sclerenchymatous cells are closely
packed without inter-cellular spaces
between them.
28. The entire surface of the plant consists of
a single layer of cells called epidermis.
Most of the epidermal cells are relatively
flat.
The outer and lateral walls of the cell are
often thicker than the inner walls.
The cells forms a continuous sheet
without inter cellular spaces.
29.
30. The complex tissue consists of more than
one type of cells which work together as
a unit.
Complex tissues help in the
transportation of organic material, water
and mineral up and down the plants.
That is why it is also known as conducting
and vascular tissue.
31. The common types of complex
permanent tissue are:
Xylem or wood
Phloem or bast.
32.
33. Think of bundles of pipes running along
the main axis of stems and roots.
It carries water and dissolved substances
throughout and consists of a
combination of parenchyma cells, fibers,
vessels, tracheids and ray cells.
Long tubes made up of individual cells
are the vessels, while vessel members are
open at each end.
34. phloem carries dissolved food
substances throughout the plant.
This conduction system is composed of
sieve-tube member and companion
cells, that are without secondary walls.
The parent cells of the vascular
cambium produce both xylem and
phloem.
This usually also includes fibers,
parenchyma and ray cells.