7-1

Skeletal SystemGross Anatomy II

Lecture 7

7-2

Appendicular Skeleton• Girdles

– Pectoral or shoulder– Pelvic

• Upper Limbs– Arm (brachial)– Forearm (antebrachial)– Wrist (carpal)– Hand (manus)

• Lower Limbs– Thigh (femoral)– Leg (crural)– Foot (pes)

Fig. 8.1

7-3

Pectoral Girdle• Scapula (2)

– Acromion process• Forms protective cover• Attachment for clavicle• Attachment for muscles

– Coracoid process• Attachment for muscles

– Glenoid cavity• Articulates with

humerus

• Clavicle (2)

Fig. 8.3

Fig. 8.2

7-4

Arm• Humerus

– Head

– Tubercles• Greater and lesser

– Intertubercular groove

– Capitulum• Articulates with radius

– Trochlea• Articulates with ulna

– Epicondyles• Attachment of forearm

musclesFig. 8.4

7-5

Forearm

• Radius– Thumb side

– Radial tuberosity (biceps brachii muscle)

• Ulna– Little finger side

– Trochlear notch

– Olecranon process

– Radial notch

Fig. 8.5

7-6

Wrist and Hand• Wrist

– 8 carpals

Fig. 8.6

7-7

Pelvis• Os Coxae: Right and Left

– Ilium– Ischium

• Sit down bone

– Pubis• Symphysis pubis

• Acetabulum• Obturator foramen• Sacrum

Fig. 8.7

7-8

Os Coxae

Fig. 8.9

7-9

Thigh• Femur

– Head– Neck– Trochanters

• Greater and lesser

– Condyles• Medial and lateral

– Epicondyles• Medial and lateral

• Patella or kneecap

Fig. 8.11

Fig. 8.12

7-10

Leg

• Tibia– Larger and supports

most of weight

– Tibial tuberosity

– Medial malleolus

• Fibula– Articulates with tibia

not femur

– Lateral malleolus

Fig. 8.13

7-11

Foot• Tarsals (7)

– Talus (ankle bone)

– Calcaneus (heel)

Fig. 8.14

7-12

Points to Remember

• Appendicular skeleton includes bones of upper and lower limbs and pectoral and pelvic girdles

• Pectoral girdle and upper limb held in place largely by muscles

• Pelvic girdle has strong articulation with sacrum to help support weight of body

7-13

Questions?