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Fetal Pig Dissection: Fetal Pig Dissection: The Muscular System
The Muscular SystemTara, Brittany, Ashley, Laura
Pre-skinned
Getting to the Muscles
0Skinning of the pig is necessary0To begin, make an incision on the mid-ventral part of
the neck where the skin is loose0A split would be then made with the scissors0Use the blunt probe while holding the skin with the
forceps to separate the skin from the underneath tissue
Getting to the Muscles
0 Continue the first incision to the umbilical cord0 Make a circle around the
umbilical cord0 From the split at the original
incision, make another from there to the lower lip
0 The next set is from the chest then cut across both arms then circle around the wrists0 The same process should be
done for the legs as well
Muscles of the Head and Face
Muscle Function Origin Insertion
Temporalis
Elevate mandible Temporal fossa Coronoid process
Masseter Elevate mandible Zygomatic arch Coronoid fossa
Digastricus Depress the mandible
Jugular; Mastoid Process
Mandible
Muscles of the Head and Face
Muscles of the Upper LimbsMuscle Function Origin Insertion
Brachialis Flexes antebrachium
Lateral shaft of humerus from the neck to the supracondyloid ridge
Lateral surface of ulna; distal semilunar notch
Deltoideus Extend & rotate humerus
Spine; scapula humerus
Triceps Brachii
Extends antebrachium
Humerus ulna
Biceps Brachii
Flexes antebrachium
Cranial edge of glenoid cavity within the capsule of the shoulder joint
radius
Trapezius Draws scapula caudad and mediad
Spines of thoracic vertebrae
scapula
Muscles of the Upper Limbs
Muscles of the Upper Limbs
Muscles of the Lower LimbsMuscle Function Origin Insertion
Tensor Fascia Latae Extends leg Illium; fascia of gluteus medius
Fascia latae
Biceps femoris Extends thigh; flexes shank
Tuberosity of ischium tibia;patella
Semi-tendinosus Extends thigh; flexes shank
Tuberosity of ischium Crest of tibia
Semi-membranosus Extends thigh Tuberosity and ramus of ischium
Medial epicondyle of femur
Digital flexors Flexes digits Proximal tibia and fibula Digits
Digital extensors Extends digits Proximal tibia and fibula Metatarsals
Peroneus Longus Flexes foot Proximal tibia and fibula Metatarsals
Peroneus Tertius Flexes foot Lateral side of distal femur
Third metatarsal
Abdominal MusclesMuscle Function Origin Insertion
Obliquus Externus Abdominis
Support abdominal viscera; compresses abdomen
Caudal ribs; lumbodorsal fascia
Aponeurosis to linea alba
Ob. Internus Abdominis
Support abdominal viscera; compresses abdomen
Lumbodorsal fascis; arches between crest of ilium and pubis
Aponeurosis to linea alba
Transversus Abdominis
Support abdominal viscera; compresses abdomen
Lumbodorsal fascia Linea alba
Rectus Abdominis Support abdominal viscera; maintains vertebral arch flexibility
Tubercle of pubis Cartilage ribs
Abdominal Muscles
Abdominal Muscles
