frog's muscular system
Post on 31-Oct-2014
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Submentalis
Geniohyoid
Hyoglossus
Mylohyoid
Masseter
Temporalis
DepressorMandibulae
CutaneousPectoralis
Sterno-radialis Deltoid
AnteriorPectoralis
MiddlePectoralis
PosteriorPectoralis
ExternalOblique
RectusAbdominis
Transversus
LatissimusDorsi
DorsalisScapulae
LongissimusDorsi
Coccygeo-iliacus
Ilio-lumbaris
Coccygeo-sacralis
Gluteus
Muscles of the Floor of the Mouth & Tongue
Origin Insertion Action
Mylohyoidinner side of the lower jaw
tendon in median lineraises the floor of the mouth for breathing
Submentalisanterior end of the mandible
tendon in mid-linepushes sublingual tubercle on lower jaw
Geniohyoiddorsally on coracoids and clavicle
Ventral side of the hyoid bulges hyoid ventrally
Hyoglossus hyoid tongueretracts/withdraws tongue forward
Depressor MandibulaePosterior edge of the tympanic ring via dorsal fascia
posterior-most end of the lower jaw
opens the mouth
Temporalisside of the skull between eye and tympanic ring
near posterior end of the lower jaw
closes the mouth
Massetertympanic ring and adjacent bones
lower jaw, behind temporal
closes the mouth
Pterygoideuspterygoid region of the skull
medial side of the condyle of the mandible
assists in jaw movement
Muscles of the Pectoral Girdle, Shoulders, &
ArmsOrigin Insertion Action
AnteriorPectoralis(PectoralisEpicoracoidea)
coracoid and epicoracoid bones
anterior end of the humerus
draws arms towards the chest/adduction of arms
Middle Pectoralis(PectoralisSternalis)
xiphisternumanterior end of the humerus
draws arms towards the chest
Posterior Pectoralis(PectoralisAbdominis)
anterior half of the rectus abdominis
anterior end of the humerus
draws arms towards the chest
Deltoidclavicle, scapula, and omosternum
deltoid crest of the humerus
draws arms forward
Sterno-radialis episternumproximal part of the radius by tendon
flexes forearm and the humerus
Abdominal Wall Muscles
Origin Insertion Action
External Oblique dorsal fascialinea alba dorsal to the previous muscle
compressor of the abdomen and respiratory muscle
Rectus Abdominis pubisdorsally on sternum & coracoid
supports the abdomen, holds the sternum
Transversustransverse process of the 4th to 9th vertebrae & the iliac bone
coracoid &xiphisternumcompressor of the abdomen and respiratory muscle
Back & Pelvic Girdle Muscles
Origin Insertion Action
Dorsalis Scapulae scapulatendon joining the latissimusdorsi
raises arms towards body
LatissimusDorsi dorsal fascia on deltoid crest raises arm dorsally
LongissimusDorsi urostylevertebrae & the back of the skull
straightens the back and raises the head
Ilio-lumbaris anterior end of the iliumtransverse process of the sacral vertebra
extensor of the back
Coccygeo-sacralis periphery of the urostyletransverse process of the 9th sacral vertebra
singly turns the back and raises it
Coccygeo-iliacus periphery of the urostyle anterior part of the ilium holds urostyle in place
Gluteusmiddle of the lateral surface of the ilium
anterior side of head of femur
draws thigh forward & upward
Pyriformisanterior surface of lateral sacrum
greater trochanter of femur, along its medial surface
laterally rotates thigh at hip, also abducts thigh if hip is flexed
Thigh Muscles Origin Insertion ActionTriceps Femoris pelvic girdle front of the tibia extensor of the shank
Biceps Femoriscrest of the ilium above the acetabulum
distal part of the femur and posterior border of the tibio-fibula
Adducts the thigh against the trunk, also extend to the shank
Semimembranosus dorsal side of the ischiumposterior end of the tibio-fibula
flexes of the shank
Gracilis Muscles edge of the ischiuminner side of the tibio-fibula below the head
flexes shank
Semitendinosus ischium by two headswith the gracilis minor on the proximal end of the tibio-fibula
adducts thigh & flexes the shank
Adductor Muscles ischium and pubis distal end of the femur adducts thigh and leg
Sartorius lower end of iliumproximal end of the tibio-fibula
flexor of the thigh
Shank Muscles Origin Insertion Action
Gastrocnemiusdistal end of the femur by a flat tendon, & edge of knee tendon
tendon of Achillesextends the foot and flexes the shank
Peroneus knee tendontibio-fibula, distally by ankle
draws shank against the thigh and extends or twist the foot
TibialisAnticus femur calcaneal bone extensor of the footTibialisPosticus femur calcaneal bone extensor of the foot
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