MAJOR TISSUES
EPITHELIAL TISSUE
Function: secretion, selective
absorption,
protection,
transcellular transport, and
sensing. Epithelial layers
contain no blood vessels, so
they
must
receive
nourishment via diffusion of
substances
from
the
underlying
connective
tissue, through the basement
membrane.
SPECIFIC TYPE OF TISSUE
SPECIMEN
CELL-Cell shape
Simple Squamous
Epithelium
The thin outer layer or the
skin of some vertebrates
that is constantly shed off
Frog skin (squamous epithelium)
Squamous cells
Cuboidal Epithelium
Found in the collective tubes
of kidney ducts of the liver
and pancreas, salivary and
thyroid glands. It is the
lining of the irregular
cavities (urineferous tubules)
Human kidney
Columnar Epithelium
Line the surface of larger
tubes through which much
passage takes place. (e.g.
stomach, intestine, bronchi,
fallopian tubes, uterus)
Frog stomach (ruga)
Frog small intestine (villus)
Nucleus-shapelocation
Round, flat,small
Flat/tile-like; can
be simple or
stratified
Central
Cuboidal cells
Round
Cube-like
Central
Columnar cells
Round
Column-like
Nucleus located
near the base
(basal)
PARTS/PARTS
POINTED
Cell membrane
Cytoplasm
Nucleus
FIBER
Cell membrane
Cytoplasm
Nucleus
None
Basal lamina
Lumen
Cell membrane
Cytoplasm
Nucleus
None
CONNECTIVE AND
SUPPORTING TISSUES
Suspends organs to body
wall, connects organ to
another organ, and secretes
the matrix. Matrix is a nonliving material composed of
fluid, gelatinous material,
long fibers or hard
mineralized materials.
SPECIFIC TYPE OF TISSUE
SPECIMEN
CELL-Cell shape
Loose Connective Tissue
(Areolar)
the most abundant form of
collagenous connective
tissue. It occurs in small,
elongated bundles
separated by regions that
contain ground substance. It
has no obvious structure
Loose connective tissue
Fibroblast
Mast Cells
Macrophages
Adipose Tissue/Fat tissue
Contain droplets of fat
(when many: globules). Acts
as an insulating layer,
helping to reduce heat loss
through the skin. It also has
a protective function,
providing mechanical
protection ("padding") and
support around some of the
major organs, e.g. kidneys.
Adipose tissue is also a
means of energy storage.
Human adipose tissue
Cartilage tissue
Its main function is to
connect bones together. It is
also found in the joints, the
rib cage, the ear, the nose,
the throat and between the
bones of the back. It
provides support, but is less
rigid than bone. It also
allows for some flexibility
of movement, but has more
stability than muscle. The
extracellular matrix of
cartilage is produced by
cells called chondroblasts/
chrondrocytes
Hyaline cartilage
Nucleus-shapelocation
Small dots
PARTS/PARTS
POINTED
Collagenous fibers
(black thick strand)
Elastic fibers
(sharply defined,
straight, few, thin)
Criss-crossed
Matrix
Adipocytes
Rounded
Rounded,
polygonal
Peripheries
Chondrocytes
Rounded
Small
Scattered
irregularly,
located in
rounded spaces
or lacuna
Cell membrane
Cytoplasm
Nucleus
Matrix
Chrondrocytes
Lacunae
Matrix
FIBER
Collagenous
Elastic
SPECIFIC TYPE OF TISSUE
SPECIMEN
CELL-Cell shape
Bone/Osseus tissue
Bone- a dense organix
matrix with mineral
deposits.
-supports vital organs.
- communication and
exchange. Blood vessels
and nerve cells located in
the Haversian canal
communicate with osteocytes
using the canaliculi.
Human bone decalcified
Osteocytes
Vasular Tissues
Includes the blood and
lymph that serve to
transport and distribute
materials in the body.
Human blood smear
Frog blood smear
Corpuscles:
Leucocytes
(WBC) &
Erythrocytes
(RBC)
LEUCOCYTES
>Granulocytes
•Neutrophil
•Basophil
•Eosinophil
>Aggranulocytes
•Lymphocyte
•Monocyte
MUSCULAR TISSUES
It is attached to the
skeleton that produces
bodily movements
Striated skeletal/Voluntary
muscle
Support and Movement.
Skeletal muscles move the
body. Skeletal muscle
contractions pull on tendons,
which are attached to
bones. If contraction of the
muscle causes the muscle to
shorten, the bone and, thus,
the body part will move.
Dog skeletal muscle
Straight
filamentous
Nucleus-shapelocation
PARTS/PARTS
POINTED
Osteocytes
Lacuna
Haversion canal
Canaliculus
Lacuna
Matrix
Asteon
Cell membrane
Nucleus
Cytoplasm
No nucleus
Multilobulated
Non-lobed,twisted
Bilobed
Big, rounded
Horse-shoe shaped
Multinucleated
Elongated
Peripheries
Sarcolemma
Nucleus
Striae
Sarcoplasm
FIBER
SPECIFIC TYPE OF TISSUE
SPECIMEN
CELL-Cell shape
Nucleus-shapelocation
One
Spherical
Central
PARTS/PARTS
POINTED
Nucleus
Sarcolemma
Sarcoplasm
Teased smooth frog tissue I
Spindle shaped
Cardiac muscle/ striated
involuntary muscles
Muscles tissues that forms
the myocardium or the walls
of the heart.
It is an extremely
specialized form of muscle
tissue that has evolved to
pump blood throughout the
body. In fact, cardiac
muscle is only found in the
heart and makes up the
bulk of the heart's mass.
Cardiac muscle
Filamentous and
branching
Fibers crosslinked to one
another
One
Spherical
Central
Nucleus
Sarcolemma
Sarcoplasm
Intergalated discs
Composed of nerve cells or
neurons. Its function to is to
transmit messages/impulse
to the body.
Located in the brain and
spinal cord.
Cow Nerve Cell
Branched with
axons and
dendrites
One spherical
Central
Dendrites
Axon
Cell body
Cytoplasm
Cell membrane
Myelin sheath
Synapses
Smooth muscle
It is found in the muscle
layers of the digestive tract.
*Tunica muscularis- stomach,
small intestine
*tunica media- blood vessel
-voluntary
- a type of muscle tissue
which is used by various
systems to apply pressure to
vessels and organs
NERVOUS TISSUES
FIBER