Muscular System. Functions of the muscular system Voluntary movement Involuntary movement Protection...

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Muscular System Muscular System

Transcript of Muscular System. Functions of the muscular system Voluntary movement Involuntary movement Protection...

Muscular SystemMuscular System

Functions of the muscular systemFunctions of the muscular system

Voluntary movementVoluntary movement

Involuntary movementInvoluntary movement

Protection of internal organsProtection of internal organs

Three types of muscle tissueThree types of muscle tissue

Skeletal muscle tissue is attached to Skeletal muscle tissue is attached to bones and causes movements of the bones and causes movements of the body. body.

Also called Also called striated musclestriated muscle or or voluntary musclevoluntary muscle

Three types of muscle tissueThree types of muscle tissue

Cardiac muscle is responsible for the Cardiac muscle is responsible for the rhythmic contractions of the heart.rhythmic contractions of the heart.

Cardiac muscle is involuntary = it Cardiac muscle is involuntary = it generates its own stimuli to initiate generates its own stimuli to initiate muscle contraction.muscle contraction.

Three types of muscle tissueThree types of muscle tissue

Smooth muscle lines the walls of Smooth muscle lines the walls of hollow organs. (ie: blood vessels and hollow organs. (ie: blood vessels and the digestive tract)the digestive tract)

Smooth muscle contraction is Smooth muscle contraction is relatively slow and involuntaryrelatively slow and involuntary

Structure of the Skeletal MuscleStructure of the Skeletal Muscle

FasciaFasciaCovering of Covering of musclemuscle

Become tendons Become tendons (only in skeletal (only in skeletal muscle)muscle)

Structure of the Skeletal MuscleStructure of the Skeletal Muscle

MyofibrilsMyofibrilsMuscle fibersMuscle fibers

ContractionContraction

In all muscle In all muscle typestypes

Structure of the muscleStructure of the muscle

Two key filaments that make up Two key filaments that make up myofibrilsmyofibrils

1. Actin is a thin filament involved in 1. Actin is a thin filament involved in contraction.contraction.

2. Myosin is a thick filament involved 2. Myosin is a thick filament involved in contractionin contraction

Connective tissue covering of Connective tissue covering of skeletal muscleskeletal muscle

Muscle FatigueMuscle Fatigue

Oxygen DebtOxygen Debt

Oxygen debt is defined as the extra Oxygen debt is defined as the extra amount of oxygen that must be amount of oxygen that must be taken in by the body for cellular taken in by the body for cellular processes, and it represents the processes, and it represents the difference between the amount of difference between the amount of oxygen needed for totally aerobic oxygen needed for totally aerobic muscle activity and the amount muscle activity and the amount actually used.actually used.

Muscular system vocabularyMuscular system vocabularyPeristalsisPeristalsis

MyopathyMyopathy

RICE (acronym)RICE (acronym)

Muscle toneMuscle tone

Isotonic Isotonic contractionscontractions

Isometric Isometric contractionscontractions

ATPATP

Anaerobic Anaerobic glycolysis glycolysis (anaerobic (anaerobic respiration)respiration)

Aerobic respirationAerobic respiration

Rigor mortisRigor mortis

Origin Origin (attachment)(attachment)

Insertion Insertion (attachment)(attachment)

Diseases/conditionsDiseases/conditionsMyasthenia gravisMyasthenia gravis

Disuse atrophyDisuse atrophy

Duchenne Muscular dystrophy (DMD)Duchenne Muscular dystrophy (DMD)

HerniaHernia

Myofascial pain syndromeMyofascial pain syndrome

SpasmSpasm

CrampCramp

StrainStrain

tetanustetanus