Appendicular Skeleton

Bones of the Appendicular Skeleton

• Total of 126 bones• Girdles

– Pectoral/Shoulder Girdle – Pelvic/Hip Girdle

• Appendages– Arms – Legs

Pectoral Girdle

• Common name• Function• Bone Names

– Common– Scientific

• Numbers• Articulations

Glenoid cavity

Acromion process

Special FeaturesScapula

Arm Bones

• Upper Arm– Humerus

• Lower Arm– Radius– Ulna

• How to distinguish radius from ulna

Special Features

• Humerus– Head– Olecranon fossa

• Ulna– Olecranon process– Trochlear notch

Special Features

• Ulna– Olecranon process– Trochlear notch

Wrist - Carpals• Never lower Tillie’s Pants,

Mother Might Come Home– Navicular, Lunate, Triquetral,

Pisiform– greater Multangular, lesser

Multangular, Capitate, Hamate• Sally Left The Party, To Take

Cathy Home– Scaphoid, Lunate, Triquetral,

Pisiform– Trapezium, Trapezoid, Capitate,

Hamate

Bones of the Hand

• Metacarpals– Count from the thumb– #1 - #5

• Fingers vs Thumbs• Phalanges

– Proximal– Middle– Distal

• Knuckles• Passing Gas

Pelvic Girdle• Each pelvic bone – Os

Coxa• 3 fused bones• Ilium

– Contains the iliac crest – hematopoietic

• Posterior joint– Ilium articulates with

the sacrum forming the sacroiliac joint.

Note: ileum is a part of the small intestine!

• Ah here’s the dance you should know• Ah, baby when the lights are down low• I say, grab your baby then go

– Do the Hucklebuck, Do the Hucklebuck• If you don’t know how to do it; Man, you are out of luck• Push ya baby out; Then you hunch her back• Start a little movement in your SACROILIAC• Wiggle like a snake, wobble like a duck• That’s when you do the Hucklebuck• A little bit of twist, A little bit of this• And if you don’t know how to do it; Ask my little sis.• Push your partner out; And then you hunch her back• Start a little movement in your SACROILIAC• Wiggle like a snake; wobble like a duct• That’s when you do the Huckle buck

Ischium

• Obturator foramen

• Acetabulum• Ischial tuberosity

Pubis

• Symphysis pubis joint is the anterior joint of the pelvic girdle.

• Between 2 pubic bones.

Male and Female Pelvic Girdles

Ischium

Pubis

Bones of the Leg

• Upper Leg– Femur

• Knee– Patella

• Lower leg– Tibia– Fibula

Special Features

• Femur– Head of femur

• Tibia– Tibial tuberosity– Medial malleolus

• Fibula– Lateral malleolus

Ankle - Tarsals• Talus• Calcaneus• Navicular• Cuboid• Lateral cuneiform• Intermediate cuneiform• Lateral cuneiform

Foot – MetatarsalsToes – Phalanges• Proximal phalange• Middle phalange• Distal phalange

Compare toe phalanges to finger phalanges.

Notice anything?