Appendicular SkeletonUpper

Appendicular Skeleton Bone

Lower Appendicular

Skeleton Bone

Similarities Differences

Clavicle Ischium/Pubis

Scapula Ilium

Humerus Femur

Radius Tibia

Ulna Fibula

Carpals Tarsals

Metacarpals Metatarsals

Phalanges Phalanges

Pectoral Girdle• Clavicle – collarbone– Anterior attachment (?)– Posterior attachment (?)

• Scapula – shoulder blades– Posterior attachment (?)– Spine – divides posterior surface into 2 sections– Coracoid process (“Corac” = ?) – curves to clavicle– Acromion process – forms tip of shoulder– Glenoid cavity (or fossa) – depression that

articulates with head of humerus

Label Diagrams

Upper Limb

• Humerus• Radius• Ulna• Carpals• Metacarpals• Phalanges

Humerus• Head fits into glenoid cavity of scapula• Greater tubercle – lateral process• Lesser tubercle – more anterior process• Intertubercular groove – narrow furrow “between

tubercles”• Deltoid tuberosity – v-shaped, rough area where

_________ muscles attach to humerus• Olecranon fossa – posterior depression that

receives an ulnar process when elbow is straightened

• Coronoid fossa – anterior depression that receives a radial process when elbow is bent

Radius

• Shorter bone of lower arm• Located on thumb side of arm• Disc-like head articulates with humeru and

with radial notch of the ulna (so your arm can rotate)

• Radial tuberosity, a process below the head, provides attachment for biceps

• Styloid process – at distal end; attachment for wrist ligaments

Ulna• Longer than radius• Overlaps distal end of humerus posteriorly• Proximal end has a wrenchlike opening called

the trochlear notch (articulates w/humerus)– Oleacronon process – top process– Coronoid process – bottom process– Radial notch – just below trochlear notch

• Head – at distal end; articulates with ulnar notch of radius

• Styloid process – attachment for wrist ligaments

Label Diagrams

Wrist• Wrist made of 8 carpal bones– “Some lovers try positions that they can’t

handle.”– Scaphoid Lunate Triquetrum Pisiform Trapezium Trapezoid Capitate Hamate

Hand

• 5 metacarpals– Numbered 1-5, starting at thumb– Bones between wrist (carpals) and fingers (?)– Rounded distal ends form knuckles

• Each finger, except thumb, has 3 phalanges:– Proximal phalanx– Middle phalanx– Distal phalanx– Thumb only has no middle phalanx.