Muscle tissue is composed of cells that have the ability to shorten or contract in order to produce movement of the body parts
Properties of Muscular Tissue
Contractibility – Ability of muscle cells to shorten
Excitability – Muscle tissue responds to a stimulus delivered from neuron or hormone
Extensibility – Ability to be stretched
Elasticity – Ability to recoil back to its original length after being stretched
Structure of Muscular tissue
Muscular tissues are bundled together and surrounded by tough connective tissue known as epimysium
The tissue made of many muscle fibres (myocytes)
Fascicles are surrounded by a protective layer known as perimysium
Muscle fibres are composed of numerous fine myofibrils
Muscle fibres can contract and relax
Muscles take part in locomotion and movements
1. Skeletal muscle
Skeletal muscles are attached to the skeleton
They are also known as striated muscles because of the presence of alternate patterns of light and dark bands
These light and dark bands are highly organized structures of actin, myosin, and proteins.
These add to the contractility and extensibility of the muscles
Skeletal muscles are also known as voluntary muscles
Skeletal muscle tissue is composed of long cells called muscle fibers that have multinucleated
They play a vital role in everyday activities
2. Smooth muscle
These muscle cells are spindle-shaped with a single nucleus
Smooth muscle is found in the walls of hollow organs throughout the body
These are non-striated, involuntary muscles controlled by nervous system
The actin and myosin filaments are very thin and arranged randomly, hence no striations
It stimulates the contractility of the digestive, urinary, reproductive systems and blood vessels
3. Cardiac Muscle Tissue
Cardiac muscle tissue is present only in the heart
They are single celled and uninucleated
The cells of the cardiac muscles known as the cardiomyocytes are striated
These are involuntary muscles and the heart pumps the blood through cardiac contractions
Muscle cells, unique junctions called intercalated discs (gap junctions)
Intercalated discs are the major portal for cardiac cell to cell communication
2. Muscle tissue is composed of cells that have the
ability to shorten or contract in order to produce
movement of the body parts
Properties of Muscular Tissue
Contractibility – Ability of muscle cells to
shorten
Excitability – Muscle tissue responds to a
stimulus delivered from neuron or hormone
Extensibility – Ability to be stretched
Elasticity – Ability to recoil back to its original
length after being stretched
3. Structure of Muscular tissue
Muscular tissues are bundled together and
surrounded by tough connective tissue known as
epimysium
The tissue made of many muscle fibres
(myocytes)
Fascicles are surrounded by a protective layer
known as perimysium
Muscle fibres are composed of numerous fine
myofibrils
Muscle fibres can contract and relax
Muscles take part in locomotion and movements
5. Skeletal muscles are attached to the skeleton
They are also known as striated muscles because
of the presence of alternate patterns of light and
dark bands
These light and dark bands are highly organized
structures of actin, myosin, and proteins.
These add to the contractility and extensibility of
the muscles
Skeletal muscles are also known as voluntary
muscles
Skeletal muscle tissue is composed of long cells
called muscle fibers that have multinucleated
They play a vital role in everyday activities
6. These muscle cells are spindle-shaped with a
single nucleus
Smooth muscle is found in the walls of hollow
organs throughout the body
These are non-striated, involuntary muscles
controlled by nervous system
The actin and myosin filaments are very thin
and arranged randomly, hence no striations
It stimulates the contractility of the digestive,
urinary, reproductive systems and blood
vessels
7. Cardiac muscle tissue is present only in the heart
They are single celled and uninucleated
The cells of the cardiac muscles known as the
cardiomyocytes are striated
These are involuntary muscles and the heart
pumps the blood through cardiac contractions
Muscle cells, unique junctions called
intercalated discs (gap junctions)
Intercalated discs are the major portal for
cardiac cell to cell communication
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