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Muscular System Cristina Medina Period 2 (Muscles (Neck (P) (Rhomboid…
Muscular System Cristina Medina Period 2
Body Movement Terminology
Gliding movements
Angular Movements
flexion
Hyperextension
abduction
adduction
circumduction
Rotation
Supination
Pronation
Dorsiflexion
Plantar Flexion
iversion
eversion
protraction
retraction
opposition
Muscle Contraction
Myosin heads bind ATP and the crossbridges with actin detach
Myosin heads split ATP and become energized
The myosin crossbridges move toward the center of the sarcomere
Myosin heads bind to actin and form crossbridges
Disorders
Shin splints
Tennis elbow
Charley horse
Electromyography
Torticollis
Ruptured calcaneal tendon
Quadriceps and hamstring strains
Hernia
Major Functions of the Muscular System
Generates heat
contractions
Movement
locomotion and manipulation, blood movement, organ and tract movement
Maintains Posture
Stabilizes Joints
Muscles
Head
temporalis
masseter
Facial
epicranius
Orbicularis oculi
zygomaticus
orbicularis oris
Shoulder (A)
Deltoid
Trapezius
Neck (A)
platysma
Sternocleidomastoid
Sternohyoid
Neck (P)
Rhomboid Minor
Trapezius
Levator scapulae
sternocleidomastoid
epicranius
splenius cervicis
splenius capitis
Rhomboid Minor
Shoulder (P)
Latissimus dorsi
Infraspinatus
Rhomboid major
Deltoid
Teres major
Arm(A)
Triceps brachii
Biceps brachii
Brachialis
Arm(P)
Triceps brachii
Brachialis
Thorax
Pectoralis Minor
Intercostals
serratus anterior
Pectoralis Major
Abdomen
Internal Oblique
transversus abdominis
External Oblique
Rectus Abdominis
Forearm (P)
brachioradialis
extensor carpi radialis longus
flexor carpi ulnaris
extensor carpi ulnaris
extensor digitorum
Forearm (A)
flexor carpi radialis
Palmaris longus
Brachioradialis
pronator teres
Pelvis/Thigh
iliopsoas
pectineus
Structural & Organization levels of the Skeletal Muscle
epimysium
perimysium
endomysium
sarcolemma
glycosomes
myoglobin
sarcoplasma
T tublue
actin
sarcoplasmic Reticulum
myosin
myofibrils
3 Types of Muscle Tissue
Cardiac Muscle
Involuntary; forms the walls of the heart and helps pump blood through the body
Skeletal Muscle
Voluntary; attached to the skeleton and helps body movement
Smooth Muscle
Involuntary; lines the walls of hollow visceral organs and helps with movement within the body