Download Appendicular Skeleton Lab Part A: Pectoral Girdle and Upper Limb

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Name:____________________________
Date:_____________________________
Appendicular Skeleton Lab Part A:
Pectoral Girdle and Upper Limb
Prelab: The pectoral girdle consists of two clavicles and two scapulae. These parts
support the upper limbs and serve as attachments for various muscles that move
these limbs.
Each upper limb includes a humerus, a radius, an ulna, eight carpals, five
metacarpals, and fourteen phalanges. These bones form the framework of the arm,
forearm, and hand. They also function as parts of levers when the limbs are moved.
Purpose: To examine the bones of the pectoral girdle and upper limb and to identify
the major features of these bones.
Materials: textbook, human skeleton articulated, disarticulated human skeleton,
colored pencils
Procedure:
Part A: The Pectoral Girdle
1. Review the section entitled “Pectoral Girdle” in chapter 7 of “Hole’s” or “Bones
of the Shoulder Girdle” in chapter 5 of Marieb.
2. As a review activity label figures 1 and 2
3. Examine the bones of the pectoral girdle and locate the following features. At
the same time, locate as many of the corresponding surface bones and
features of your own skeleton as possible.
Scapula
Clavicle
Spine
Acromion
Coracoid
Glenoid Cavity
Process
Process
(fossa)
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Figure 1 Pectoral Girdle
A.____________________________bone
F._______________________________
B.____________________________bone
G._______________________________
C.____________________________Bone
H._______________________________
D.____________________________bone
I.______________________________Bone
E.____________________________bone
J.______________________________Bone
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Figure 2 Scapula
A. ____________________________
C. ____________________________
B. ____________________________
4. Complete part A of the conclusion.
Part B: The upper limb
1. Review the section entitled “Upper Limb” in chapter 7 of “Hole’s” and “Bones
of the Upper Limb” in chapter 5 of Marieb.
2. As a review activity, label figures 3-5.
3. Examine the following bones and features of the upper limb:
Humerus
Radius
Head
Head
Greater tubercle
Radial tuberosity
Trochlea
Styloid process
Olecranon fossa
Carpal bones
Coronoid fossa
Metacarpal bones
Ulna
Phalanges
Trochlear notch
Proximal
Olecranon process
middle
Coronoid process
distal
4. Use colored pencils to distinguish individual bones in each figure 1-5. Use
different colors to represent the regions you are responsible for on the
practical.
5. Complete part B of the conclusion
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Figure 3 : Humerus
A._______________________________
D._______________________________
B._______________________________
E._______________________________
C._______________________________
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Figure 4
A.______________________________
E.______________________________
B.______________________________
F.______________________________
C.______________________________
G.______________________________
D.______________________________
H.______________________________
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Figure 3 Hand
A.___________________________
F.___________________________
B.___________________________
G.___________________________
C.___________________________
H.___________________________
D.___________________________
I.___________________________
E.___________________________
J.___________________________
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Conclusion:
Part A: Complete the following statements.
1. The medial ends of the clavicles articulate with the ______________________________
of the sternum.
2. the lateral ends of the clavicles articulate with the ______________________________
of the scapulae.
3. The __________________________________________ is a bone that serves as a brace
between the sternum and the scapula.
4. The _________________________________________ divides the scapula into unequal
portions.
5. The tip of the shoulder is the _______________________________________ of the
scapula.
6. At the lateral end of the scapula, the ____________________________________ curves
anteriorly and inferiorly from the clavicle.
7. The glenoid cavity (fossa) of the scapula articulates with the
___________________________________ of the humerus.
Part B: Match the bones in column b with the features in column A. Place the letter
of your choice in the space provided.
Column A
Column B
______1. 8 bones
______2. Coronoid fossa
______3. 5 palmar bones
______4. 14 bones in the digits
______5. Olecranon fossa
______6. Radial tuberosity
______7. trochlea
______ 8. trochlear notch
______9. Styloid process (could be 2 bones)
______10. Coronoid process
______11. greater tubercle
______12. Head (could be 2 bones)
A. Carpals
B. Humerus
C. Metacarpals
D. Phalanges
E. Radius
F. Ulna