Chapter 7 Part 2- Skeletal System

Clavicle

• Collarbone
• Joins sternum anteriorly
and scapula laterally
• MOST FREQUENTLY
BROKEN BONE

Scapula

Shoulder blade

Spine of Scapula

posterior
raised ridge

Supraspinous fossa

supra (above) Muscles that move the arm
attach to these fossae

Infraspinous fossa

infra (below) Muscles that move the arm
attach to these fossae

Acromion process

joins the clavicle

Glenoid cavity

shallow socket
that joins with the humerus

Coracoid process

muscle
attachments

Humerus

Upper arm

Head of the Humerus

(proximal end) joins the
glenoid cavity of the scapula
to make the ball-and-socket
joint of the shoulder

Epicondyles

(distal ends)
medial and lateral , tendons
attach

Olecranon fossa

depression that receives the
olecranon process of ulna

Ulna

Medial lower arm (pinky
side)

Styloid Process

(distal end)
– articulates with the wrist,
is attached to head of the
ulna

Olecranon Process

(proximal end) – large
process that forms the point
of the elbow

Trochlear Notch

trochlea
of humerus fits into this
notch

Radius

• Lateral lower arm (thumb
side)
• Head of radius is proximal,
sits in the radial notch of
the ulna

Radial – Ulnar Movement

• Forearm supine, radius
and ulna parallel
• Forearm prone, radius
rotates around the ulna
so that the 2 shafts
cross

Carpals

Wrist bones (8) • Some Lovers Try
Positions That They
Cannot Handle
• Scaphoid, Lunate,
Triquetral, Pisiform,
Trapezium, Trapezoid,
Capitate, Hamate

Metacarpals

• Hand bones
• 5 each hand
• Number 1 is the thumb
• Rounded distal ends
form the knuckles

meta-

(near, beyond)

Phalanges

• Finger bones
• 14 total
• Proximal, Middle, and
Distal
• Thumb has proximal
and distal only