Tissue Level of Organization: Overview
TISSUES
4 Major Categories
EPITHELIAL
cover, line, glandular
CONNECTIVE
bind, protect, support
MUSCULAR
movement, force
NERVOUS
signal, communicate,
regulate
Tissue Level of Organization: Epithelial Tissue
EPITHELIAL
cover, line, glandular
Simple squamous
epithelium
filtration, diffusion
, exchange, lining
alveoli of lungs, blood
capillary walls, lining of
blood and lymphatic
vessels
Stratified
squamous
epithelium
protection from “wear
and tear”, abrasion
epidermis of skin, lining
of mouth, throat,
esophagus, , vagina
Simple columnar
epithelium
secretion and absorption
lining of stomach and
intestine
ciliated form in fallopian
tubes, brain ventricles
Ciliated
pseudostratified
columnar epithelium
Transitional
epithelium
protection, sweeping
lines upper
respiratory tract
lines urinary
bladder
accommodate changes in
organ size
Tissue Level of Organization: Connective Tissue
CONNECTIVE
binds, supports, protects,
compartmentalizes, transports
Loose
Dense
fibers are loosely
arranged around cells
areolar
reticular
adipose
dense irregular
dense regular
Liquid
densely packed fibers
between fewer cells
blood
lymph
Cartilage
transports, immunity
Osseous (Bone)
strength, flexibility,
attachment,
protection
elastic cartilage
fibrocartilage
hyaline cartilage
compact bone
spongy bone
strength, support,
movement,
protection, mineral
storage, blood cell
production
Tissue Level of Organization: Muscular Tissue
MUSCULAR
generate force,
cause movement
Skeletal
Cardiac
multinucleated, voluntary,
cells: long fibers, striated
attach to bone and
skin: move body parts
Smooth
uni- or bi-nucleated, involuntary,
cells: branched and short, striated
wall of the heart:
generates pumping
force to move blood
uni-nucleated, involuntary,
cells: spindle-shaped,
non-striated
walls of tubes and hollow
organs: move substances
through organs; form valves
(sphincters)
Tissue Level of Organization: Nervous Tissue
NERVOUS
detect, signal, control, communication
Neurons
generate electrical impulses;
release neurotransmitters
Glia
surround and support neurons
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