The upper limb forms a joint with
the trunk via the shoulder girdle
The shoulder girdle consist of two clavicles and two scapula .
Clavicle
(collar bone )
S-shaped
long bone
It's
articulate with the manubrium of the sternum at the sternoclavicular joint and
forms the acromioclavicular joint with the acromion process of the scapula .
Scapula
(shoulder blade )
Triangular
shaped bone , lying on the posterior chest wall superficial to the ribs and separate
from them by muscles
At the
lateral angle is a shallow articular surface , the glenoid cavity , which with
the head of the humerus,forms the shoulder joint. (At the lateral angle could
be a shallow body part surface , the glenoid fossa , that with the top of the
arm bone,forms the cotyloid joint.)
Highest
point of the shoulder is called the acromion process and forms a joint with the
clavicle the acromioclavicular joint , a slightly movable synovial joint that
contribute to the mobility of the shoulder girdle .
The
coracoid process a projection from the upper border of the bone gives
attachment to muscles that move the shoulder joint .
Humerus
Upper arm
bone
Head sists with
in the glenoid cavity of the scapula
The greater
and lesser tubercles , and between them there is a deep groove.
The
bicipital groove or intertubercular, occupied by one of the tendons of the biceps
muscle
The distal
end of the bone presents two surfaces that articulate with the radius and ulna
to form the elbow joint
Ulna and radius
Two bones
of the forearm
They articulate
with the humerus at the elbow joint . The carpal bone at the wrist joint and
with each other at the proximal and distal radioulnar joint.
In addition
an interosseous membrane , a fibrous joint , connects the bone along their
shaft stabilising their association and maintaining their relative position despite
forces applied from the elbow or wirst
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