ACTIVITY Synovial Joints: the Structure of Synovial Joints in the Upper Limb 8 o

Question

ACTIVITY Synovial Joints: the Structure of Synovial Joints in the Upper Limb 8 of a fluid-filled joint fluid-filled joint apsule is a thin layer of loose connective tissue called the symovial membeane. It produces synovial fluid that is secreted into the are defined by the presence Synovial jolnts surasthe articular cartilage, which composed of absorbs shock and reduces friction. A joint capsule, of cavity. The articulating bony surfaces are covered by a smooth strong fibrous connective tissue, is attached to each bone in the oint and encloses the joint cavity. Lining the inside of the jolnt joint cavity to provide lubricatioe and shock absorption during movement. Accessory structures that strengthen and support synovial joints include ligansents, barsae (singular barsa), menisci (singular meniscus), and fat pads The shoulder jolnt has the greatest range of motion of any jolnt in the body. On a skeleton, examine the shoulder joint and identify the surfaces that are covered by articular cartilage. Humerus Cut out a strip of paper that is 5 cm long and 0.5 cm wide. On a skeleton or disarticulated scapula, wrap the paper strip around the glenold cavity so that the edge extends about 3 mm beyond the rim. The paper strip approximates the position of the fibrocartilaginous ring called the glenoid labrum. What do you think is the function of this structure? Frontal section On a shoulder model, identify the following ligaments that support the shoulder: The acromioclavicular ligament supports the superlor aspect of the shoulder This ligament is actually a part of the acromloclavicular (AC) joint. How would you dlassify the AC joint? Clavicle Acromion The coracoclavicular ligaments help to stabilize the clavicle.What type of brous joint do these ligaments form? The coracoacromial ligament connects what two bone markings on the scapula? Joint capsule Coracoid peocess The igament s this ligament rior aspect of the shoulde To connect? Anterior view The glenohumeral ligaments dentify its bony connections support the anterior aspect of the shoulder

Explanation / Answer

1)SHOULDER JOINT is a ball and socket joint in which the head of humerus fits into the socket of scapula

gliding surfaces of synovial joint are covered with articular cartilage.includes, articulating bone,periosteum,articular cartilage articular capsule .

2)glenoid labrum

3)AC joint classification: given by rockwood:

coracoclavicular ligaments form acromioclavicular joint. helps in stabilizing the joint

coracoacromial ligament connects coracoid process and acromian

coraco humeral ligament connects coracoid process to the greater tubercle of humerus

gleno humeral ligament connects glenoid fossa of scapula to the head of the humerus

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