Muscular System Elina Shibata
Major Functions of the Muscular System
Names of all the muscles
3 types of muscle tissues
Body Movement Terminology
Structure and Organizational levels of the Skeletal Muscle
Disorders associated with the Muscular System
Smooth
Skeletal
Cardiac
Location
Function
Characteristics
Location
Function
Characteristics
Location
Function
Characteristics
Striated
Involuntary
heart
Pumps blood through the circulatory system
Smooth
Involuntary
stomach
arteries
intestine walls
Regulates the flow of blood and the arteries and air through the lungs
Striated
Voluntary
around bones and other muscles
Aids in the overall movement of the body
Contracts and extends voluntarily
Muscle Fiber
Endomysium
Perimysium
Fascicle
Epimysium
Muscle
Myofibril
consists of hundreds to thousands of muscle cells, connective tissue wrappings, blood vessels, and nerve fibers
covers external muscle
discrete bundle of muscle calls, segregated from the rest of the muscle by connective tissue shath
surrounds fascicles
elongated multi-nucleated cell, banded
surrounds muscle fiber
contractile elements that occupy most of the muscle cell volume, composed of sarcomeres arranged end to end and they appear banded
Sarcomere
contractile unit, composed of myofilaments made up of contractile proteins
Myofilament
contractile myofilaments are thick and thin
thick : bundled myosin molecules
thin : actin molecules
hyperflexion
eversion
hyperextension
inversion
flexion
pronation
extension
supination
adduction
rotation
abduction
circumduction
tilt
deviation
dorsiflexion
plantar flexion
movement
helps to stabilize joints
maintain posture
generate heat during activity
voluntary and controlled by skeletal muscles
involuntary and controlled by smooth muscles
muscular dystrophy
myalgia
muscle strain
torn muscle
fibromyalgia