Term 2 Exam: Chapter 8 Pectoral Girdle Flashcards
What is the primary function of the appendicular skeleton?
Movement
What are girdles?
Name two:
Attach the limbs to the axial skeleton
- Pectoral girdle: consists of bones that hold the upper limbs in place
- Pelvic girdle: consists of bones that hold the lower limbs in place
How many bones are in each upper limb?
32 bones in 2 separate regions
What are the two separate regions of the upper limb?
Name the bones associated with each.
- Pectoral Girdle
- 1 scapula
- 1 clavicle
- The Free Part
- 1 humerus (arm)
- 1 ulna (forearm)
- 1 radius (forearm)
- 8 carpals (wrist)
- 5 metacarpals (palm)
- 19 phalanges (fingers)
What are the ends of the clavicle called?
- Medial end is the Sternal End
- Broad, flat lateral end is the acromial end
Where does the medial end of the clavicle articulate?
the medial end of the clavicle articulates with the manubrium of the sternum to form the sternoclavicular joint
Where does the lateral end of the clavicle articulate?
The lateral end of the clavicle articulates with the acromion of the scapula to form the acromioclavicular joint
What is the purpose of the conoid tubercle and impressions for the costaclavicular ligament?
these serve as attachments for ligaments
What is the common name for the scapula?
Shoulder blade
Describe the scapula
Large, triangular, flat bone with a ridge on its posterior surface
What are two surface features of the scapula?
- Spine
- Acromion
What is the spine of the scapula?
Large process on the posterior at ends laterally as the acromion
What is the acromion? (2)
- Flattened lateral portion of the spine of the scapula
- articulates with the acromial end of the clavicle to form the acromioclavicular joint
What is the Coracoid process?
Protruding projection on the anterior surface
What is the glenoid cavity of the scapula) (2)
- Shallow depression inferior to the acromion
- Accepts the head of the humerus to form the glenohumeral (shoulder) joint