3.5: Practice for Muscle Model Labeling
- Page ID
- 72650
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This document is designed to help you practice labeling lab models that may be used on a lab practical. For the pictures below, identify each lettered part. You should also be able to describe origins, insertions, and actions for all muscles listed in the supplemental lab manual and/or lab objectives for online labs. You’ll notice there may be repetition of muscle names; this is to give you multiple perspectives of the different models. Answers are at the end of this document.
Model#1 Muscle Fiber Model
Model#2 Mini Person Model
Model#3 Leg Models
Model #4 Arm Model
Model #5 Large Torso Model
Model #6 Internal Torso
Model #7 Muscles of Respiration (Identify the muscles labeled 62 and 63)
Answers for Model #1 Muscle Fiber Model
A. Sarcolemma
B. I-band
C. A-band
D. Sarcoplasmic reticulum
E. T-tubule or transverse tubule
F. M line
G. Mitochondria (of the muscle fiber)
H. Sarcolemma
I. NMJ or neuromuscular junction or synapse between muscle fiber and motor neuron or synaptic cleft
J. Acetylcholine or acetylcholine in synaptic vesicle or synaptic vesicle
K. Z-disc
L. Myelin sheath
M. Schwann cell (specifically this is the nucleus of the Schwann cell)
N. Motor neuron or efferent neuron
O. T-tubule
P. Endomysium
Q. Sarcoplasmic reticulum
R. Motor neuron or efferent neuron
S. Sarcolemma
T. Myofibril
U. NMJ or neuromuscular junction or synapse between muscle fiber and motor neuron or synaptic cleft
V. Mitochondrion
Answers for Model #2 Mini Man Model
A. Frontalis or frontal belly of the epicranius
B. SCM or sternocleidomastoideus
C. Pectoralis major
D. Deltoid
E. Biceps brachii (the correct muscle is biceps brachii, not just biceps)
F. External abdominal obliques
G. Rectus abdominus
H. Sartorius
I. Rectus femoris
J. Tibialis anterior
K. Nothing labeled
L. Occipitalis or occipital belly of the epicranius
M. Levator scapulae
N. SCM or sternocleidomastoideus
O. Trapezius
P. Infraspinatus
Q. Teres minor
R. Teres major
S. Latissimus dorsi
T. Gluteus maximus
U. Biceps femoris
V. Semitendinosus
W. Semimembranosus
X. Gastrocnemius
Y. Frontalis or frontal belly of the epicranius
Z. Temporalis
AA. Masseter
BB. Levator scapulae
CC. SCM or sternocleidomastoideus
DD. Trapezius
EE. Deltoid
FF. Orbicularis occuli
GG. Orbicularis oris
HH. Buccinator
II. Pectoralis major
JJ. Rectus femoris
KK. Vastus lateralis
LL. Tibialis anterior
MM. Gastrocnemius
NN. Adductor longus
OO. Gracilis
PP. Vastus medialis
QQ. Vastus medialis
RR. Gastrocnemius
Answers for Model #3 Leg Models
A. Sartorius
B. Adductor longus
C. Rectus femoris
D. Gracilis
E. Vastus lateralis
F. Vastus medialis
G. Tibialis anterior
H. Patellar ligament
I. Tibialis anterior
J. Gastrocnemius
K. Soleus
L. Fibularis longus or peroneus longus
M. This is extensor digitorum longus, not a muscle you need to know, but perhaps it may show up as extra credit on a practical
N. Nothing labeled
O. Gastrocnemius
P. Soleus
Q. Calcaneal tendon or Achilles tendon
R. This is popliteus, not a muscle you need to know, but perhaps it may show up as extra credit on a practical
S. Tibialis anterior
T. Vastus medialis
U. Tibialis anterior
V. Vastus medialis
W. Sartorius
X. Adductor longus
Y. Gracilis
Z. Gastrocnemius
AA. Gastrocnemius
BB. Calcaneal tendon or Achilles tendon
CC. Soleus
DD. Fibularis longus or peroneus longus
EE. Gluteus medius
FF. Piriformis
GG. Semitendinosus
HH. Biceps femoris (as with biceps brachii, the correct answer here is biceps femoris, not just biceps)
II. Vastus lateralis
JJ. Semimembranosus
KK. Gluteus maximus
LL. Biceps femoris (as with biceps brachii, the correct answer here is biceps femoris, not just biceps)
MM. Semitendinosus
NN. Gracilis
OO. Semimembranosus
PP. Gastrocnemius
QQ. Calcaneal tendon or Achilles tendon
RR. Soleus
Answers for Model #4 Arm Model
A. Subscapularis
B. Deltoid
C. Triceps brachii (the correct muscle is triceps brachii, not just triceps)
D. Biceps brachii (the correct muscle is biceps brachii, not just biceps)
E. Biceps brachii (the correct muscle is biceps brachii, not just biceps)
F. Triceps brachii (the correct muscle is triceps brachii, not just triceps)
G. Teres major
H. Teres minor
I. Nothing labeled for I
J. Infraspinatus
K. Deltoid
L. Supraspinatus
M. Biceps brachii (the correct muscle is biceps brachii, not just biceps)
N. Subscapularis
O. Deltoid
Answers for Model #5 Large Torso Model
A. Pectoralis minor
B. Rectus abdominus
C. Internal abdominal oblique
D. Trapezius
E. Deltoid
F. Pectoralis major
G. Frontalis or frontal belly of the epicranius
H. Orbicularis occuli
I. SCM or sternocleidomastoideus
J. Buccinator
K. Orbicularis oris
L. Gluteus maximus
M. Gluteus medius
N. Piriformis (you can tell because you see the sciatic nerve coming through it)
O. Sciatic nerve (this is not a muscle 😊, but is an important nerve for the posterior leg muscles)
Answers for Model #6 Internal Torso
P. Nothing labeled
Q. Diaphragm
R. Diaphragm
S. Psoas major*
T. Quadratus lumborum
U. Nothing labeled
V. Iliacus*