Lab Exam Notes: Lab 4- Muscular System Part 1

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Department
Biological Sciences
Course
BIOB33H3
Professor
Connie Soros
Semester
Fall

Description
MUSCLE ORIGIN INSERTION ACTION/FUNCTION VENTRAL MUSCLES Pectoralis Major Sternum Humerus of foreleg Adducts foreleg (moves it toward the chest) Pectoralis Minor Sternum Proximal end of the humerus Adducts and retracts the foreleg Latissimus Dorsi Dorsal, lateral and ventral Proximal end of the humerus Moves the foreleg caudally sides to the pig on the medial surface and dorsally External Oblique Abdominal Posterior ribs and Ventral aponeurosis near the Huff and puff muscles Muscle lumbodorsal fascia linea alba Internal Oblique Abdominal Huff and puff muscles - - Muscle Transverse Abdominus - - Huff and puff muscles Rectus Abdominus - - Huff and puff muscles External Intercostals Raise the rib cage during - - inhalation Internal Intercostals Lower the rib cage during - - expiration NECK MUSCLES Brachiocephalic Back of the neck, back of Humerus Moves the forelimb the head and the mastoid anteriorly process Sternomastoid Sternum and splits into a Mastoid process on either Flexes the head to the chest “V” shape side of the head and inclines it to one side or the other Digastric Temporal and occipital bones Mandible Acts to lower the jaw of the skull Sternum “breast bone” - - - Thyroid Cartilage “adam’s - - - apple” Trachea - - - Thyroid Gland - - Endocrine system. Smaller
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