Download Tissues

Tissues
Similar Cells serving the
same purpose
Tissue Types and Varieties
 Epithelial
Tissue
 Connective
 Muscle
Tissue
Tissue
 Nervous
Tissue
Epithelial Tissue / Epithelium
 Covers
the body – lines the cavities
 Closely
packed cells – no matrix
 Contains
 Always
no blood vessels
anchored to a basement
membrane.
Classification of Epithelial Tissue
By Shape
 Squamous – flat and
scale-like.
 Cuboidal – square or
cube-like.
 Columnar – columns
that are higher than
they are wide.
By Arrangement
 Simple – single layer,
same shape.
 Stratified – many
layers, same shape.
 Transitional – several
layers changes from
one shape to another.
 Pseudostratified –
appears stratified, but
all cells attached to
basement membrane.
Connective Tissue
 Most
abundant in the body, widely
distributed.
 Has the most forms and varieties
 Does contain intracellular matrix.
 Cells called fibroblasts produce
reinforcing fibers.
Varieties of Connective Tissue
Areolar – glue that holds organs
together. Pg.
Adipose – (fat) lipid or energy storage.
Fibrous – firm yet flexible, ex: tendon.
Bone – calcified matrix, functions in
support, protection, mineral storage.
Haversian systems are bone building
areas.
Varieties Continued:
Cartilage – Made of chondrocytes. Firm
and plastic-like.
Blood – Liquid is the matrix, cells are
red, white, and platelets. Function is
transportation of cellular materials.
Muscle Tissue
Skeletal - attaches to bones, also called
striated or voluntary, striations visible
under microscope.
 Cardiac - composes walls of heart, also
called striated and involuntary, striations
visible, intercalated disks present.
 Smooth - non-striated and involuntary,
lines the blood vessels and tube-shaped
organs.

Nervous Tissue
 Neurons
- conduct impulses, rapid
communication from brain to organs.
Components=Axon, Dendrite, Cell
Body.
 Glia - supportive and connective.
Tissue Repair and Regeneration

Epithelial and
connective
regenerate easily.
Ex: skin, bone,
tendons and
ligaments.
Muscle and
nervous have
limited abilities to
repair.
Ex: paraplegic,
quadriplegic, nerve
damage.
