Tissues Flashcards
(28 cards)
The substitution of viable cells for dead cells by
regeneration or fibrosis.
Tissue repair
p.70
In this process, stem cells, which can divide
throughout life, and other dividing cells regenerate new cells of the same type as those that were destroyed.
Regeneration
p.70
In this process, the destroyed cells
are replaced by different cell types, which causes scar formation.
Fibrosis
p.70
It involves
- clot formation,
- inflammation,
- the formation of granulation tissue,
- regeneration or fibrosis of tissues.
Tissue repairs
p.70
Effects of Aging on Tissues
- Cells divide slower as people age which cause injuries to heal slowly
- Extracellular matrix containing collagen and elastic fibers becomes less flexible and less elastic.
p.70
What will happen if the extracellular matrix become less flexible and elastic?
- skin wrinkles,
- elasticity in arteries is reduced,
- bones break more easily
p.70
A group of specialized cells and the extracellular
substances surrounding them.
Tissue
p.70
What do you call the microscopic study of tissue
structure?
Histology
p.70
Types of Tissues
- epithelial,
- connective,
- muscle,
- nervous.
p.70
TRUE OF FALSE !!
The structure of each tissue type
is related to its function,
and the structure of the tissues in an organ
is related to the organ’s function
TRUE , it is related
p.70
TRUE OR FALSE !!
If there are changes in tissues, it can result in development, growth, aging, trauma, or disease.
TRUE
p.70
Give an example of a situation wherein
changes in tissues occurred.
Skeletal muscles enlarge because
skeletal muscle cells increase in size
in response to exercise.
p.70
One way to identify tissue
abnormalities, including cancer after changes in tissue happened.
Microscopic examination
p. 70
IDENTIFICATION
List the general characteristics of epithelial tissue.
- Mostly composed of cells.
- Covers body surfaces.
- Distinct cell surfaces.
- Cell and matrix connections.
- Nonvascular
- Capable of regeneration.
Epithelial tissue consists almost
entirely of cells, with __________________________
with very little extracellular matrix
between them.
Where is the body surface located?
- the exterior surface,
- the LINING of the digestive urinary, reproductive, and respiratory tracts,
- the heart and blood vessels,
- linings of many body cavities
Why are epithelial cells characteristics include having distinct cell surfaces?
because epithelial cells have 3 distinct surfaces :
- free or apical surface (exposed)
- lateral surface (attached to others)
- basal surface (base)
This specialized type of extracellular material helps attach the epithelial cells to the
underlying tissues.
The basement membrane
TRUE OR FALSE
All epithelial tissues have basement membranes.
A few epithelial tissues, such as
those in lymphatic capillaries and liver sinusoids, do not have basement membranes,
TRUE OR FALSE
Basement membranes play
an important role in supporting and guiding cell migration during tissue repair.
True
“epi” means
on
“thele” in epithelia means
covering or lining
Why are epithelial tissues non vascular?
Blood vessels in the underlying connective
tissue do not penetrate the basement membrane to reach the epithelium;
(non vascular means not related to blood vessel)
The major functions of epithelia
- Protecting underlying structures.
- Acting as a barrier.
- Permitting the passage of substances.
- Secreting substances.
- Absorbing substances.
