HUMB1000 Lecture Notes - Lecture 2: Skeletal Muscle, Cardiac Muscle, Perimysium
12 Jun 2018
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MUSCLE TISSUE
Muscle tissue is widely distributed throughout the body
Function:
• Produce movement of the skeleton or other tissues of the body
o Organ movement
o Maintenance of posture
o Communication → facial expression and vocalization
o Control of body openings
o Heat production
Properties of Muscle Tissue
❖ Composed of cells called muscle fibres.
❖ Each fibre contains contractile proteins that
contribute to the properties of muscle tissue
o excitability
o conductivity
o contractility
o elasticity and extensibility
3 types of muscle tissue
❖ Skeletal
❖ Cardiac
❖ Smooth
Skeletal Muscles
❖ Under voluntary control, usually attached to bones
via tendons
❖ Skeletal muscle fibres are long, thin, and cylindrical
❖ Each fibre has multiple oval-shaped nuclei located
to the sarcolemma; plasma membrane of a muscle
cell
❖ Skeletal muscle fibres are surrounded by delicate
layer of connective tissue called endomysium
❖ Multiple muscle fibres are bundled together to form
fascicles, which are covered by a dense connective
tissue layer called perimysium
❖ The perimysium contains the nerves and blood
vessels that supply the muscle fibres.
❖ The numerous fascicles are then collected to form a
muscle that is covered by an external sheath of dense
connective tissue, known as epimysium
find more resources at oneclass.com
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Document Summary
Muscle tissue is widely distributed throughout the body. Function: produce movement of the skeleton or other tissues of the body, organ movement, maintenance of posture, communication facial expression and vocalization, control of body openings, heat production. Each fibre contains contractile proteins that contribute to the properties of muscle tissue: excitability, conductivity, contractility, elasticity and extensibility. Under voluntary control, usually attached to bones via tendons. Skeletal muscle fibres are long, thin, and cylindrical. Each fibre has multiple oval-shaped nuclei located to the sarcolemma; plasma membrane of a muscle cell. Skeletal muscle fibres are surrounded by delicate layer of connective tissue called endomysium. Multiple muscle fibres are bundled together to form fascicles, which are covered by a dense connective tissue layer called perimysium. The perimysium contains the nerves and blood vessels that supply the muscle fibres. The numerous fascicles are then collected to form a muscle that is covered by an external sheath of dense connective tissue, known as epimysium.
