Skeletal Systems III: Appendicular Skeleton Flashcards
appendicular muscles general components
bones of the shoulder, hip, and the limbs that attach to each
the appendicular muscles is split up into what two sections?
upper and lower extremities
upper extremity components
pectoral girdle, humerus, forearm, carpal bones, and the hand
pectoral girdle components
scapula and clavicle
what is the pectoral girdle also called?
the shoulder
pectoral girdle function
- anchors the upper limb to axial body
- allows movement of the shoulder
- site of glenohumeral joint**
scapula location
- flat, triangular bone
- located in the upper back
- connects to the clavicle
scapula function
- serves as anchoring point for the upper limb
- site for attachment of humerus
- provides surface for movement for the humerus
what is the scapula also called?
shoulder blade
scapula components
body, glenoid fossa, spine, acromion process, coracoid process
scapula body location
shoulder blade
scapula glenoid fossa location
- a shallow, pyriform articular surface
- located on the lateral angle of the scapula
scapula glenoid fossa function
- humerus articulates here
- anchoring point of limb
scapula spine location
- extends across the dorsal surface of scapula
- runs through the anterior
scapula spine function
-origin to part of the supraspinatus fossa and infraspinatus fossa
scapula acromion process location
-the high-point located at the lateral end of the spine
scapula acromion process function
- attachment site for portion of the deltoideus muscle(arm abductor)
- attachment site for upper fibers in trapezius muscle
- has a small articular facet for the distal end of clavicle to attach(clavicular facet)
what do the fibers in the trapezius muscle that attach to the acromion process do?
act as scapular rotators
scapula coracoid process location
- looks like a crow
- hook-like structure
- lateral edge of the superior anterior portion of the scapula
scapula coracoid process function
-attachment for ligaments and muscles
clavicle location
- large doubly curved bone
- located directly above first rib
clavicle function
- helps support upper limb at the shoulder
- serves as an attachment to the axial skeleton
- articulates with the acromion process laterally and the manubrium medially
what is the clavicle also known as?
the collar bone
humerus location
- long bone in upper arm
- located between the elbow joint and the shoulder