EDEL, ELYZEAH KYRIE B.
MEDICAL BIOLOGY 4C
CHARACTERISTICS OF ADISPOSE TISSUE
TYPES OF AT
DISTRIBUTION
DISTINGUISHING FEATURES
FUNTIONAL
HISTOGENESIS
CHARACTERISTICS
WHITE AT
Subcutaneous fat
✓ Cytoplasm near the nucleus
Thins: appearance of areolar
contains a golgi complex,
Males: fat layer thickens
Females: additional fat
tissue
from mesenchymal precursor
amount of RER, and free
turnover regulated by
fibroblasts
ribosomes
several histophysiological
mitochondria, a small
✓ termed as Yellow AT or
Fat deposits of variable size
Reason: dietary carotenoids
surround blood and lymphatic
accumulate in the lipid droplet,
vessels in the omentum and
making the tissue yellow
mesenteries suspended in the
✓ Unilocular adipocytes derive
triglycerides
deposited in the breasts
Intra-abdominal fat
✓ store fatty acids in
yellow fat
✓ undergo continuous
factors
✓ Released fatty acids
cells that resemble
✓ Numerous small lipid
droplets in the cytoplasm
signals the transformation of
these cells into lipoblasts
✓ Accumulation of lipid –small
fuses until single droplet
abdominal cavity
BROWN AT
✓ Less abundant than white
at all ages
✓ Multilocular adipose tissue
multiple small lipid droplets in
its adipocytes
✓ have a spheric, centrally
located nucleus
✓ Contain many mitochondria
– tan to reddish-brown
tissue color is due to
chiefly mitochondrial
cytochromes
✓ Loose CT septa give brown
adipose tissue a lobular
appearance like that of a
gland in histo sections
✓ Many functional capabilities
same as to white AT
✓ Metabolic activity is more
intense
✓ Numerous vessels
supplying this tissue carry
the heat to the body
✓ Multilocular adipocytes of
brown fat derive form
mesenchymal precursors that
assume an epithelial shape
and arrangement
✓ Multiple small fat droplets
that appear during
development do not
coalesce during maturation
EDEL, ELYZEAH KYRIE B.
MEDICAL BIOLOGY 4C
CHARACTERISTICS OF CARTILAGE TYPES
TYPES OF CARTILAGE
HYALIN CARTILAGE
CELL TYPE
Chondrocytes
FIBER TYPE
✓ Matrix contains
thin fibril of
type II collagen
✓ Their small
size and their
refractive index
make them
difficult to
distinguish with
the LM
GROUND
SUBSTANCE
✓ GAG’s – mostly
chondroitin sulfates
and hyaluronic acid
✓ Proteoglycan
✓ Proteoglycan
aggregates –
covalently linked to
long chains of
hyaluronic acid by
link proteins
ORGANIZATION
FUNCTIONS
✓ Consistency of
Ability to grow
The coastal
results from
maintaining its
most of the
hyaline cartilage
extensive cross-
linking among its
components
✓ Matrix immediately
surrounding the
rapidly while
rigidity makes
hyaline cartilage
an ideal fetal
tissue
chondrocytes
chondroblasts and
chondrocytes
sheath is called
mass
both elastin and
collagen
rings supporting
the trachea,
HC
protein
perichondrium.
cartilaginous
the bronchi are
Perichondrium
composition from
cartilages, the
in the walls of
chondroitin sulfate,
and the fibrous
laryngeal
cartilage plates
✓ Glycoprotein
wavy bundles of
fibrils that differ in
(rib) cartilages,
and irregular
✓ Tissue fluid
ELASTIC CARTILAGE
LOCATION
surrounds the elastic
provides flexible
support
found in the
auricle of the
external ear,
walls of the
external
auditory canals
and auditory
tubes,
epiglottis, and
the corniculate
and cuneiform
cartilages of
the larynx
EDEL, ELYZEAH KYRIE B.
FIBROCARTILAGE
MEDICAL BIOLOGY 4C
Fibrochondrocytes
Matrix immediately
surrounding the
chondrocytes
resembles that of
HC and contains
some type II
collagen
collagen fibres
(Type I collagen)
contains equal
amounts of dermatan
sulfate and
chondroitin sulfate
No distinguishable
perichondrium
important in
Sites in
bone and providing
the annulus
attaching bone to
restricted mobility
humans include
fibrosus of the
intervertebral
disks, the
symphisis
pubis, and
certain boneligament
junctions
EDEL, ELYZEAH KYRIE B.
MEDICAL BIOLOGY 4C
CHARACTERISTICS OF CONNECTIVE TISSUE
TISSUE TYPE
Loose collagenous CT
(areolar)
CELLS
Fibroblasts,
Consist of loose
mast cells, and
types of fibers
macrophages,
some white blood
cell
Dense collagenous CT
(CT proper)
FIBERS
network of different
GROUND
SUBSTANCE
moderately viscous
ORGANIZATION
disorganize
Fixed – many
FUNCTIONS
Conveys oxygen
muscle fibers
avascular epithelia
CT sheaths
and nutrients to
and their dense
Wandering –
suspended
predominantly
Collagen fibers –
identical to areolar
its extracellular matrix
Covering fragile
in tendons,
(fibrocytes)
component
abundant
strands
and protecting
periosteum,
fibroblast
predominant
tissue but less
is organized into loose
tissues and organs
them from
multidirectional
mechanical
process
Reticular CT
LOCATIONS
reticular cells
type III collagen
fibrils
ligaments,
perichondrium,
deep fascia
and some
organ capsules
Supports motile
hematopoietic
body fluids
marrow, spleen
cells and filters
tissues: bone
and lymph
nodes
Elastic CT
sparse and similar to
provides flexible
non-load-
CT
predominates in
parts such as
that of other dense
support and
the ligamenta flava
of the vertebral
column and the
suspensatory
ligaments of the
penis
bearing body
the nose, ears
and
epiglottis. Lungs
and arteries,
dermis layer,
EDEL, ELYZEAH KYRIE B.
MEDICAL BIOLOGY 4C
ligaments and
tendons.
Mucous CT
primitive fibroblast
Large stellate,
fibroblasts with
branching and
anastomosed
cytoplasmic
processes.
Wharton's jelly
secretion of
ground substance,
fibers.
umbilical cord