There are 4 main types of tissues in the body: epithelial, connective, muscular, and nervous tissue. Connective tissue is characterized by an abundance of extracellular matrix proteins and fibers that support and connect other tissues. There are several categories of connective tissue classified by their matrix composition, including loose connective tissue, dense connective tissue, adipose tissue, and special connective tissues like blood, cartilage, and bone. Connective tissues have a variety of important functions, such as connecting and supporting other tissues, providing insulation, and in the case of blood, transporting substances around the body.

1. Epithelial
Tissue
Connective
Tissue
Mascular
Tissue
Nervous
Tissue

2. kind of Biologicala
characterized of the
Composed by
tissue that cells and
abundance
specialized supports,
of
connects,
extracellular
extracellular or
protein
components. different
separates
fibers called matrix.
types of tissues and
organs of the body.

4.  categories of
connective tissue based
on composition of
matrix

6. primary
cell type secrete
extracellular proteins
(fibers

7. Fibers:
• collagen- long,
straight, unbranched
• reticular- thinner,
flexible, branching
• elastic- branched
and wavy

9. •Loose connective tissue is the most
common type of connective tissue
in vertebrates.
Functions:
It holds organs in place and
attaches epithelial tissue to other
underlying tissues.
It also surrounds the blood vessels
and nerves.

10. Areolar Connective tissue
-tissue that consists of a meshwork of
collagen, elastic tissue, and reticular fibres
- with many connective tissue cells in
between the meshwork of fibres.
Collagen fiber
Elastic fibers
Fibroblasts

11. Areolar Connective tissue
Functions:
•Support
•Strength, and
•Elasticity.
Location:
•Areolar tissue is found in many
locations around the body.
•One important area is the skin

12. Adipose Connective tissue
-a loose fibrous connective
tissue packed with many
cells (called "adipocytes")
that are specialized for
storage "fats".
fat-filled vacuole

13. Adipose Connective tissue
Location:
Functions:
•Adipose tissue acts asaan insulating
•Adipose tissue forms thick
layer,under the skin, around
layer
•It also has a protective function,
the kidneys and in the buttocks
and support around some of the major
organs.
•A means of energy storage.

14. Dense Connective tissue
- also called dense fibrous tissue,
has fibers as its main matrix
element.

16. Dense regular Connective tissue
-Provides connection between
different tissues. The collagen fibers in
dense regular connective tissue are
bundled in a parallel fashion .
Includes:
-tendons
tough band of fibrous connective tissue th
usually connects muscle to bone and is
capable of withstanding tension
-Ligaments
the fibrous tissue that connects bones to
other bones

17. Tendons Ligaments

18. Dense irregular Connective tissue
-has fibers that are not arranged in
parallel bundles
Collagen
irregularly arranged

19. Located:
-This type of tissue is also in the
protective white layer of the eyeball
and in the deeper skin layers.

21. •Blood
• Lymph

22. Blood
- plasma (watery matrix)
formed elements:
• Red blood cells (erythrocytes)
• White blood cells (leukocytes)
• Platelets
2. LYMPH
formed from interstitial fluid
lymph vessels, lymph nodes
lymphocytes (types of WBC) –
immunity

23. erythrocytes
Blood Vessel

25. Structural tissues – support and
protection
Solid matrix, lots of fibers w/ few cell
relative to matrix
Two main types
1. CARTILAGE
2. BONE

26. CARTILAGE
CHONDROCYTES, found in Lacunae
Matrix: solid/semi-solid (gelatinous)
Ground: chondroitin sulfates
Fibers: collagen, elastic, reticular
Cartilage is avascular

27. 3 types of cartilage:
1. Hyaline cartilage
2. Fibrocartilage
3. Elastic cartilage

28. BONE
Cells: OSTEOCYTES
Ground: calcium salts,
little fluid
Fibers: collagen
Bone has a well-
developed blood supply