Transcript Tissues - Cobb Learning

Tissues:
The
Living
Fabric
Anatomy & Physiology
Tissues
 covering
 support
 movement
 control
 Tissues:
groups of closely
associated cells that are
similar in structure and
perform a common or
related function
Histology
study of
tissues
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Tissues contain
60-99 % Water
Various dissolved
substances
Water is slightly
salty (0.9%)
Called Tissue Fluid
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Too Much Tissue Fluid is Edema
Not Enough Tissue Fluid is
Dehydration
4 Main types of Tissue
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Epithelial
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Connective
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Nerve
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Muscle
Epithelial Functions
Protection
Absorption
Filtration
Excretion
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Covers the Surface of the body
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Forms the lining of the Intestinal tract.
Respiratory Tract, Circulatory Tract, and
Urinary Tracts
Surrounds many body cavities
Forms glands in body that produce very
specific secretions needed for bodily
function
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Connective Tissue
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Most abundant & widely distributed tissue
Binding & support, protection, insulation
Widely separated cells with abundant
intercellular matrix
Soft Connective Tissue
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-wraps and cushions
organs, nerves
-Adipose: fat, food/energy
reserve, insulation,
padding; under skin,
around eyes, kidneys
-soft internal skeleton of
lymph nodes, spleen,
bone
Insulates body
Fibrous Connective Tissue
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Ligaments
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Tendons
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Connects Bone to bone and bone to
muscles
Hard Connective Tissue
Cartilage & Bone
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Cartilage: tough, elastic
material found between
vertebrae, at ends of
long bones, nose, ears,
larynx
No nerves
Poor blood supply
Heals poorly
Ossous/Bone
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Calcium salts
Nerves
Blood vessels
Body structure/support
Calcium storage
Hematopoiesis
Nervous Tissue
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Made up of special cells called neurons and
neuroglia (support cells)
Transmits messages throughout the body
Reacts to stimuli
Brain, spinal cord, nerves
Muscle Tissue
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Highly cellular
Well vascularized
Power and movement through contractions
3 types
Skeletal Muscle
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Attaches to bone
Striated
Voluntary
Cardiac Muscle
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Causes heart to beat
Striated
Involuntary
Visceral/Smooth
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In walls of hollow,
internal organs
Digestive tract, urinary
tract, uterus, blood
vessels
No striations
Involuntary
Epithelial Membranes
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Combinations of epithelial tissue and
connective tissues
5 types
Mucous Membrane
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Lines body cavities
“Wet” membrane
Absorption and
secretion
Serous Membrane
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Lines closed body
cavities
Secretes serous fluid
Protects against friction
Pleura, peritoneum,
pericardium
Synovial Membrane
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Fibrous tissue that lines
the cavities of freely
movable joints
Dense Fibrous Membrane
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Tough, opaque
Protection
Dura mater,
periosteum, sclera
Cutaneous Membrane
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“Dry” membrane
Skin