A&P chapter 9 Study Guide Part 7

Linea Alba

A white line that extends from the sternum to the pubic bone formed by the aponeurosis of the abdominal muscles

Pectoralis Major

Anterior chest muscle that adducts and flexes the arm across the chest

Intercostals

Barbecued ribs

Diaphragm

Dome-shaped muscle that separates the thoracic cavity from the abdominal cavity

Quadriceps femoris

Group of muscles that extend or straighten the leg at the knee, as in kicking a football

Quadriceps femoris

Included the rectus femoris, vastus medialis, vastus lateralis, and vastus intermedius

Hamstrings

Includes the biceps femoris

abdominal muscles

Includes the internal oblique, external oblique, transversus and rectus

Serratus anterior

Jagged muscle that resembles the teeth of a saw; lowers the shoulder and moves the arm, as in pushing a cart

Latissimus dorsi

Large, broad muscle located over the middle and lower back; lowers the shoulders and brings the arms back, as in swimming and rowing

pectoralis major

Large, broad muscle that forms the anterior chest wall; connects the humerus with the clavicle and structures of the chest

Gluteus Maximus

Largest muscle in the body that forms part of the buttocks; you sit on this muscle

Tibialis anterior

Located over the shin bone; causes dorsiflexion

Sartorius

Longest muscle in the body; used to sit cross-legged

Hamstrings

Muscle group on the posterior surface of the thigh that flexes the leg at the knee; antagonist to the quadriceps femoris

Biceps Brachii

Muscle that flexes the forearm; when you ask a child to "make a muscle," this is the one that pops up.

Deltoid

Muscle that forms the shoulder pads positions the arms in the "scarecrow" position

Triceps brachii

Muscle that lies along the posterior surface of the humerus; it extends the forearm and is used to bear weight in crutch-walking

Trapezius

Muscle that shrugs the shoulders and hyperextends the head

Adductors

Muscles located on the medial surface of the thigh; horseback riders use these muscles to grip the horse with their thighs

Intercostals

Muscles responsible for raisingand lowering the rib cage during breathing

Gastrocnemius

The Achilles tendon attaches the soleus and this muscle to the heel bone

Biceps brachii

The brachialis and the the brachioradialis work synergistically with this muscle to flex the forearm at the elbow

Gastrocnemius

The calf muscle that is used in plantar flexion; also called the toe dancer's muscle

Diaphragm

The chief muscle of inhalation

Soleus

With regard to plantar flexion, works synergistically with the gastrocnemius