Download - Bio 22 Post-Lab - The Muscular System (New Ver.)

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Page 1: Bio 22 Post-Lab - The Muscular System (New Ver.)

The Muscular System

Christian BueranoAbby CortezWindale delos SantosMelizza SorianoArah Sacdalan

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DORSAL SIDE

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VENTRAL SIDE

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MUSCLES OF THE FLOOR OF THE MOUTH AND TONGUE

Genohyoid

Hyoglossus

Myohoid

Submental

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Origin: inner side of the lower jawInsertion: tendon in median lineAction: raises the floor of the mouth for breathing

Myohoid

Submental

Origin: anterior end of the mandibleInsertion: tendon in mid-lineAction: pushes sublingual tubercle on lower jaw

Genohyoid

Origin: dorsally on coracoid and clavicleInsertion: ventral side of the hyoidAction: bulges hyoid ventrally

Hyoglossus

Origin: hyoidInsertion: tongueAction: retracts of withdraws tongue forward

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LOWER JAW

Masseter

Depressor Mandibuli

Temporalis

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Depressor Mandibuli

Origin: posterior edge of the tympanic ring via dorsal fasciaInsertion: posterior-most end of the lower jawAction: opens the mouth

Temporalis

Origin: side of the skull between eye and tympanic ringInsertion: near posterior end of the lower jawAction: closes the mouth

Masseter

Origin: tympanic ring and adjacent bonesInsertion: lower jaw, behind temporalAction: closes the mouth

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PECTORAL GIRDLE, SHOULDERS, AND ARMS

Sterno-radialis Deltoid

PectoralisEpicoracoidea

Pectoralis Sternalis

Pectoralis Abdominis

*Cutaneous Pectoralis

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Origin: coracoid and epicoracoid bonesInsertion: anterior end of the humerusAction: draws arms towards the chest/adduction of arms

Pectoralis Epicoracoidea

Pectoralis Sternalis

Origin: xiphisternumInsertion: anterior end of the humerusAction: draws arms towards the chest

Pectoralis Abdominis

Origin: anterior half of the rectus abdominisInsertion: anterior end of the humerusAction: draws arms towards the chest

Deltoid

Origin: clavicle, scapula, and omosternumInsertion: deltoid crest of humerusAction: draws arm forward

Sterno-radialis

Origin: episternumInsertion: proximal part of the radius by tendonAction: flexes forearm and the humerus

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ABDOMINAL WALL

External Oblique

Transversus

Rectus Abdominis

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External Oblique

Origin: dorsal fasciaInsertion: linea alba dorsal to the previous muscleAction: compressor of the abdomen and respiratory muscle

Rectus Abdominis

Origin: pubisInsertion: dorsally on sternum and coracoidAction: supports the abdomen, holds the sternum

Transversus

Origin: transverse process of the 4th to 9th vertebrae and the iliac boneInsertion: coracoid and xiphisternumAction: same with the external oblique

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BACK AND PELVIC GIRDLE

Ilio-lumbaris

Dorsalis Scapulae

Latissimus Dorsi

Longissimus Dorsi

Gluteus

Coccygeo-iliacus Coccygeo-

sacralis

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Origin: scapulaInsertion: tendon joining the latissimus dorsiAction: raises arm towards body

Dorsalis Scapulae

Latissimus Dorsi

Origin: dorsal fasciaInsertion: on deltoid crestAction: raises arm dorsally

Longissimus Dorsi

Origin: urostyleInsertion: vertebrae and the back of the skullAction: straightens the back and raises the head

Ilio-lumbaris

Origin: anterior end of the iliumInsertion: transverse process of the sacral vertebraAction: extensor of the back

Coccygeo-sacralis

Origin: periphery of the urostyleInsertion: transverse process of the 9th sacral vertebraAction: singly turns the back and raises it

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Coccygeo-iliacus

Origin: periphery of the urostyleInsertion: anterior part of the ileumAction: holds urostyle in place

Gluteus

Origin: middle of the lateral surface of the ileumInsertion: anterior side of head of femurAction: draws thigh forward and upward

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THIGH (Dorsal)

1. Gluteus

2. Pyriformis

3. Triceps Femoris

4. Semimembranosus

5. Biceps Femoris

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1. Sartorius

2. Adductor Longus

3. Adductor Magnus

4. Gracilis Major

5. Gracilis Minor

6. Semitendinosus

THIGH (Ventral)

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Origin: pelvic girdleInsertion: front of the tibiaAction: extensor of the shank

Triceps Femoris

Biceps Femoris

Origin: crest of the ileum above the acetabulumInsertion: distal part of the femur and posterior border of the tibio-fibulaAction: adducts the thigh against the trunk, also extend to the shank

Semimembranous

Origin: dorsal side of the ischiumInsertion: posterior end of the tibio-fibulaAction: flexes of the shank

Gracilis Muscles

Origin: edge of the ischiumInsertion: inner side of the tibio-fibula below the headAction: flexes shank

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Semitendinosus

Origin: ischium by two headsInsertion: with the gracilis minor on the proximal end of the tibio-fibulaAction: adducts thigh and flexes the shank

Adductor Muscles

Origin: ischium and pubisInsertion: distal end of the femur Action: adducts thigh and leg

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SHANK (Dorsal)

1. Gastrocnemius

2. Peroneus

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SHANK (Ventral)

1. Gastrocnemius

2. Tibialis Posticus

3. Extensor Cruris

4. Tibialis Anticus

Longus

5. Tibio-fibula bone

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Origin: distal end of the femur by a flat tendon, and edge of knee tendonInsertion: tendon of AchillesAction: extends the foot and flexes the shank

Gastrocnemius

Peroneus

Origin: knee tendonInsertion: tibio-fibula, distally by ankleAction: draws shank against the thigh and extends or twista the foot

Tibialis Anticus

Origin: femurInsertion: calcaneal boneAction: extensor of the foot

Tibialis Posticus

Origin: femurInsertion: calcaneal boneAction: extensor of the foot

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QUIZ

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MUSCLES OF THE FLOOR OF THE MOUTH AND TONGUE

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LOWER JAW

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PECTORAL GIRDLE, SHOULDERS, AND ARMS

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ABDOMINAL WALL

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BACK AND PELVIC GIRDLE

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THIGH (Dorsal)

1.

2.

3.

4.

5.

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1.

2.

3.

4.

5.

6.

THIGH (Ventral)

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SHANK (Dorsal)

1.

2.

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SHANK (Ventral)

1.

2.

3.

4.

5.

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• Sources:

• http://www.animalcorner.co.uk/animalgroups/dfrogmuscle.html

• http://www.google.com.ph/imglanding?imgurl=http://shs.westport.k12.ct.us/mjvl/biology/dissect/frog_images/frog_muscles_dorsal.jpg&imgrefurl=http://shs.westport.k12.ct.us/mjvl/biology/dissect/frog.htm&h=1500&w=1115&sz=187&tbnid=AQvShJS0kSLXGM:&tbnh=150&tbnw=112&prev=/images%3Fq%3Dfrog%2Bmuscles&zoom=1&q=frog+muscles&usg=__CXMftte77R3h9uEa3ARu-QnxBIg%3D&sa=X&ei=Z-U6TZbjB4OsrAe4-PToCA&ved=0CBsQ9QEwAg

• http://bioweb.uwlax.edu/zoolab/lab-9b/Frog-Muscles-1.htm

• http://bioweb.uwlax.edu/zoolab/lab-9b/Frog-Muscles-2.htm

• http://bioweb.uwlax.edu/zoolab/lab-9b/Frog-Muscles-3.htm

• http://bioweb.uwlax.edu/zoolab/lab-9b/Frog-Muscles-4.htm

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GOODLUCK!