Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

25 Cards in this Set

  • Front
  • Back

Thoracic Cage

• Composed of

– Thoracic vertebrae posteriorly

– Sternum and costal cartilages anteriorly

– Ribs laterally

Thoracic Cage


– Protects vital organs of thoracic cavity

– Supports shoulder girdles and upper limbs

– Provides attachment sites for muscles of

neck, back, chest, and shoulders

Ribs 1-7

True Ribs

Ribs 8-12

False ribs

Floating ribs

#11 and 12

Components of thoracic cage:

Ribs: True(1-7), False(9-12), Floating(11-12)

Jugular notch

Clavicular notch


Sternal angle


Xiphisternal joint





Costal cartilage

Costal margin


components of sternum


-Sternal Angle

-xiphesternal joint

-Xiphoid process

–Pectoral girdle function

• Attaches upper limbs to body trunk

Pelvic girdle

• Attaches lower limbs to body trunk,

designed to be weight bearing

Pectoral girdle consists of:

1 clavicle & 1 scapula

Clavicles and scapulae functions and characteristics

– Attach upper limbs to axial skeleton

– Provide attachment sites for muscles that

move upper limbs

– allows for maximum movement, but reduces

stability, maximum mobility not seen anywhere else

Sternoclavicular joints

: only attachment points of the pectoral girdle to the axial skeleton

Clavicle function

(collarbone): act as braces to hold

the scapula and arms out laterally

Scapula: articulates with

clavicles & with humerus bones of upper arm

– Scapulae (pl.) or shoulder blades

The Upper Limb

• 30 bones

= skeletal framework of upper limb

– Arm

• Humerus

– Forearm

• Radius and ulna

– Hand

• 8 carpal bones in the wrist

• 5 metacarpal bones in the palm

• 14 phalanges in the fingers


– Medial bone in forearm

– Forms major portion of elbow joint with



– Lateral bone in forearm

– Head articulates with capitulum of humerus

and radial notch of ulna

Connects radius and ulna

Interosseous membrane connects radius and

ulna along their entire length

Carpus (Wrist)

– Eight bones in two rows

Proximal row of carpus—lateral to medial

Scaphoid, lunate, triquetrum, and pisiform

Distal row of carpus—lateral to medial

Trapezium, trapezoid, capitate, and hamate

Form wrist joint:

Only scaphoid, lunate, and triquetrum form

wrist joint which radius is involved more than


Elbow joint

Ulna is major player in the formation of the

elbow joint

Metacarpus (Palm)

– Five metacarpal bones (#1 to #5 from thumb

to little finger) form the palm

Phalanges (Fingers)

– Fingers numbered 1–starting at thumb (pollex)

– Digit #1 (Pollex) has 2 bones - no middle phalanx

– Digits #2 – 5 have 3 bones—distal, middle,

and proximal phalanx