1) The document describes the process of skinning a fetal pig to expose the underlying muscles, including making incisions from the neck to the umbilical cord and around the limbs. 2) It then lists some of the major muscles of the head, upper limbs, lower limbs, and abdomen, providing their functions, origins, and insertions. 3) The muscles described include the temporalis, masseter, digastricus in the head, brachialis, deltoideus, triceps, and biceps in the upper limbs, and the tensor fascia latae, biceps femoris, semi-tendinosus, semi-membranosus, and

1. Fetal Pig Dissection: The Muscular System Tara, Brittany, Ashley, Laura

2. Pre-skinned

3. Getting to the Muscles Skinning of the pig is necessary To begin, make an incision on the mid-ventral part of the neck where the skin is loose A split would be then made with the scissors Use the blunt probe while holding the skin with the forceps to separate the skin from the underneath tissue

4. Getting to the Muscles Continue the first incision to the umbilical cord Make a circle around the umbilical cord From the split at the original incision, make another from there to the lower lip The next set is from the chest then cut across both arms then circle around the wrists The same process should be done for the legs as well

6. 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

7. Muscles of the Head and Face

8. Muscles of the Upper Limbs Muscle 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

9. Muscles of the Upper Limbs

10. Muscles of the Upper Limbs

11. Muscles of the Lower Limbs Muscle 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

12. Abdominal Muscles Muscle 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

13. Abdominal Muscles

14. Abdominal Muscles