Anatomy 30 Lab Exercise 12 – Muscular System
I. Lab Objectives
A. Name and locate major muscles of the body
B. Describe the actions of the muscles
Activities – Label the following muscles on the attached muscle model pictures. Describe the
actions of each muscle listed below. We will look at associated muscles of a cat in lab. The cat
muscles can also be viewed on the Penn State Anatomy web site at:
http://www.bio.psu.edu/people/faculty/strauss/anatomy/musc/muscular.htm. Animations of
muscle actions can be viewed at: http://www.getbodysmart.com.
Head & shoulders model
Orbicularis oculi
Orbicularis oris
Masseter
Temporalis
Sternocleidomastoid
Platysma
Ventral Torso Model, Tiny Tim, & Cat (Note that the Tiny Tim model shows superficial
muscles on its right side and deep muscles on its left side in the torso region.)
Pectoralis major
Pectoralis minor
Serratus anterior (ventralis)
External intercostals
Internal intercostals
Diaphragm (internal)
Rectus abdominis
2
External oblique
Internal oblique
Transversus abdominis (internal)
Linea alba (a tendinous sheath)
Tiny Tim muscle model (anterior)
Tiny Tim muscle model (posterior)
Posterior Torso Model, Tiny Tim, & Cat
Trapezius
Latissimus dorsi
Rhomboids
Teres major
Infraspinatus
Gluteus maximus
Gluteus medius
Complete the Lab 12 Review Sheets on pp. 143-147.
3
Arm model & Cat
Deltoid
Biceps brachii
Brachialis
Brachioradialis
Triceps brachii
Arm & Forearm (anterior)
Posterior & Lateral Leg model & Cat
Gluteus maximus
Gluteus medius
Tensor fasciae latae
Iliotibial tract (an aponeurosis)
Biceps femoris
Semitendinosus
Semimembranosus
Gastrocnemius
Soleus (deep to gastrocnemius)
Achilles (calcaneal) tendon
Arm & Forearm (posterior)
4
Thigh & Leg (anterior)
Anterior & medial Leg model & Cat
Rectus femoris
Vastus lateralis
Vastus intermedius (deep to rectus femoris)
Vastus medialis
Patellar ligament
Sartorius
Gracilis
Adductor longus
Adductor magnus (femoris in cat)
Tibialis anterior
Thigh & Leg (posterior)