Click here to load reader

Appendicular Skeleton

  • View

  • Download

Embed Size (px)


Appendicular Skeleton. The Upper Limbs. The Upper Limbs – Shoulder Girdle. Shoulder Girdle (aka Pectoral Girdle) contains two bones: clavicle and scapula Clavicle makes up the collarbone Attaches to manubrium medially ( sternal end) at the sternoclavicular joint - PowerPoint PPT Presentation

Text of Appendicular Skeleton


AppendicularSkeleton The Upper Limbs

The Upper Limbs Shoulder GirdleShoulder Girdle (aka Pectoral Girdle) contains two bones: clavicle and scapulaClavicle makes up the collarboneAttaches to manubrium medially (sternal end) at the sternoclavicular jointAttaches to scapula laterally (acromial end) at acromioclavicular jointServes to push arm back from thoracic cage and helps prevent shoulder dislocationThe Upper Limbs Shoulder Girdle

Anterior ViewSuperior ViewThe Upper Limbs Shoulder GirdleThe Scapulae are the shoulder bladesAttached to clavicles, but held loosely in place by musclesTriangular shape with three sides (Superior border, Medial border, and Lateral border) and three angles (Superior angle, Lateral angle, and Inferior angle)Suprascapular notch on superior border allows nerves to pass over scapulaSpine is ridge on top half of posterior side of scapulaLateral end of spine is Acromion processCoracoid process is inferior and anterior to acromionAcromion and coracoid processes make the superior border of the Glenoid cavity (the socket for the arm)The Upper Limbs Shoulder Girdle

Anterior ViewPosterior ViewThe Upper Limbs ArmThe arm consists of one long bonethe HumerusThe rounded Head of the humerus fits in the glenoid cavity of the scapulaLateral to the head are the Greater and Lesser tubercles, which serve as sites of muscle attachmentPartway down the bone is the Deltoid tuberosity for the deltoid (shoulder) muscle to attachThe Radial groove, which goes by the deltoid tuberosity, marks the path of the radial nerveThe distal end includes the Trochlea and Capitulum that articulate with the bones of the forearmThe Coronoid and Olecranon fossae are depressions that allow the forearm bone Ulna to move when bending and extending the elbowThe Upper Limbs Arm

Anterior View Right ArmPosterior View Right ArmThe Upper Limbs ForearmThe Forearm includes two bones--the Radius and the UlnaThe Forearm bones articulate at both ends by radioulnar jointsThe bones are connected by interosseous membraneThe radius is the lateral bone in the anatomical position (same side as thumb)The flattened head forms a joint with the capitulum of the humerusBelow the head, on the anterior side is the Radial tuberosity where the bicep muscle attachesThe Upper Limbs ForearmThe ulna is the medial bone in the anatomical positionOn the proximal end are the Olecranon and Coronoid processes which articulate with the fossae of the humerusIn between the processes is the Trochlear notch that glides along the trochlea of the humerusThe Upper Limbs Forearm

Anterior View Right ArmPosterior View Right Arm

The Upper Limbs Forearm

Anterior View Right ArmPosterior View Right Arm

The Upper Limbs HandThe hand consists of the Carpals, Metacarpals, and PhalangesThe carpals make up the wristThe wrist, or carpus, is made of 8 short bones that are lined up in 2 irregular rowsThe carpal bones are bound tightly by ligaments that allow minimal movementThe 5 metacarpal bones make up the palmThe phalanges are the finger bones14 bones totalBones are labeled Proximal, Middle, and Distal for each finger (thumb only has proximal and distal as there are only two bones)The Upper Limbs Hand