Anatomy Lab Exam 1 (WSU Biology 315) Questions and Answers with Complete Solutions 100% Verified

Thoracic Wall - These are Muscles of the Rib Cage External Intercostals - Slant Downward and Forward Between Ribs Internal Intercostals - Slant Downward and Outward. Depress Ribs when You Forcefully Breathe Out External Oblique - Slants Same Direction as External Intercostals Inguinal Ligament - The Thick Inferior Edge of the EO Aponeurosis. An Important Land-mark in the "Groin" Internal Oblique - Slants Same Direction as Internal Intercostal. Under the External Oblique Transversus Abdominis - Last Layer Fascicles Run Horizontally Aponeuroses - Strong Flat Tendons Linea Alba - White Line Rectus Abdominis - Fascicles Run Vertically. Flexes the Vertebral Column (So You Can Do Sit-UP) Tendinous Intersections - Usually Three - They Break the Muscle into Segments and Form the "Six Pack" Rectus Sheaths - Covers the Six Pack Pectoral Regions - Chest Pectoralis Major - Top Lay (BIG) Pectoralis Minor - Attaches the Scapula to the Ribs Second Layer Serratus Anterior - Saw. Think of the Teeth is a Saw. Attaches the Medial Border of the Scapula to the Ribs Trapezius - Name this Muscles Descending Part of the Trapezius - Elevates the Scapula Transverse Part of the Trapezius - Retracts the Scapula Ascending Part of the Trapezius - Depresses the Scapula Latissimus Dorsi - Even Though it is Located Far Away in the Back, it Acts on the Humerus Rhomboids Major - Attaches the Scapula to the Vertebral Column. Major is Inferior to Minor Rhomboids Minor - Attaches the Scapula to the Vertebral Column. Minor is Superior to Major Levator Scapulae - Attaches the Scapula to the Cervical Vertebrae. Elevates the Shoulder (Shrugs) Deltoid - Attaches the Humerus to the Pectoral Girdle Teres Major - Teres = Round and Long Supraspinatus - Fills the Supraspinous Fossa. Abducts the Humerus Infraspinatus - Fills the Infraspinous Fossa. Rotates the Humerus Outward Subscapularis - Fills the Subscapula Fossa. Rotates the Humerus Inward Rotator Cuff - Stabilize the Large Head of the Humerus Platysma - Tenses the Skin of the Neck Sternocleidomastoid - Attachments are in the Name. If this Muscle Doesn't Turn Your Head Nothing Will ;) Anterior Scalene Muscle - Attaches Ribs 1 and 2 to the Vertebral Column. Landmarks for Nerves to the Upper Limb Middle Scalene Muscle - Attaches Ribs 1 and 2 to the Vertebral Column. Landmarks for Nerves to the Upper Limb Posterior Scalene Muscle - Attaches Ribs 1 and 2 to the Vertebral Column. Landmarks for Nerves to the Upper Limb Anterior Belly of the Digastric Muscle - These Muscles Elevate the Hyoid Bone When You Swallow Mylohyoid - Supports the Floor of the Mouth. It is also Right Under the Anterior Belly of the Digastric Muscle Sternohyoid - These Muscles Depress the Hyoid Bone After it has been Raised Sternothyroid - These Muscles Depress the Hyoid Bone After it has been Raised Thyrohyoid - These Muscles Depress the Hyoid Bone After it has been Raised Omohyoid - From Shoulder to the Hyoid Bone Superior Belly of the Omohyoid - Towards the Neck Inferior Belly of the Omohyoid - Towards the Shoulder Frontal Belly of the Occipitofrontalis - Attaches to and Moves the Scalp. In the Forehead. Surprise!!! Occiptial Belly of the Occipitofrontalis - Muscle on the Skin in the Back of the Head Orbicularis Oculi - Closes the Eyelids Orbicularis Oris - Pucker Up! Buccinator - Compresses Your Cheeks so Your Food Stays in Your Mouth Zygomaticus Major - SMILE! Masseter - Elevates the Mandible - Clenches the Teeth Temporalis - Elevates and Retracts the Mandible Medial Pterygoid - Side-to-side Grinding. Attach to the Pterygoid Plates of the Sphenoid Bone Lateral Pterygoid - Side-to-side Grinding. Attach to the Pterygoid Plates of the Sphenoid Bone Coracobrachialis - Attachments are in the Name Biceps Brachii - Two Origins