Muscular SystemJessica Yeh

Eleanor Yan

StructuresSkeletal muscles made of myofiberMyofilaments are threadlike strands that

make up musclesDifferent types of filaments in muscle

strands: thick and thinThick filaments made of protein: myosinThin filaments made of protein: actinSeparate filaments pull against each other

and create a contraction for muscles to function

Types of Muscle TissueSmooth Muscles: Controlled by brain

and bodyEx. Muscle behind our eyes that keep them

focused

Skeletal Muscles: We can control this muscles

Ex. Abdominals

Cardiac Muscles: InvoluntaryEx. Heart

Muscles Smooth Skeletal

Cardiac

Muscular Conditions and Diseases

MUSCULAR DYSTROPHYInherited DisorderPatient develops muscle weakness and loss in

muscle tissueSymptoms: lack of motor skills, eye dropping,

droolingIf left untreated, patient lose ability use

musclesMuscular dystrophy does not have cure,

doctors use physical therapy to slow the progression of the disease

MUSCULAR DYSTROPHY

MYOSITISInflammation skeletal musclesCaused by immune system attacking healthy

muscle tissueSymptoms: rashes, difficulty in speech and

motor skillsNo cure, but medications and physical

therapy lessen the effectsMedications will prevent the immune system

from attacking the healthy tissue

COMPARTMENT SYNDROMEPressure in muscles build, causes decrease in

blood flowNutrients and oxygen cannot reach certain

cells if blood doesn’t flowSyndrome caused by fractures or badly

bruised musclesSymptoms: numbness, difficulty in muscle

movement, burning sensation

COMPARTMENT SYNDROME

MYOSITIS

Strengths and Weakness

StrengthsBody stability: keeps us from falling down

quicklyProvides heat: keeps our body warm and at

the right temperatureMovement: Allows body to move like walk,

chew, blinkWe give our body nutrition to stay healthyAllows body to perform actions that we would

die without

Eating Healthy Movement

WeaknessesIf muscle is severely damaged, surgery and

physical therapy must be usedIf injured, would prevent movement and

stability in muscleCan also be damaged to a point of misuseFractures and bruises can also lead to

dangerous conditions Muscles help maintain homeostasis but only

to certain degrees

Fracture Physical therapy

Healthy Muscular SystemMaintain through exercise, healthy diets,

protecting muscles from injuryExercise: helps muscles stay strong and

healthy, lowers risk of developing weaknessDiet: Proteins and fruits supply muscles with

nutrientsPreventing injuries: warm up before exercise,

protective gear, drink lots of water

Thank you for listening!