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Appendicular Skeleton (pg 8)

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Page 1: Appendicular skeleton

Appendicular Skeleton (pg 8)

Page 2: Appendicular skeleton

Appendicular Skeleton (pg 8)

• 126 bones

Page 3: Appendicular skeleton

Appendicular Skeleton (pg 8)

• 126 bones• Arms and legs plus the girdles that attach

them to the axial skeleton

Page 4: Appendicular skeleton

Pectoral Girdle

Attaches arm to body

Page 5: Appendicular skeleton

Pectoral Girdle

Attaches arm to body1. Clavicle: Collarbone. S-shaped. Articulates

with the manubrium of sternum and scapula

Page 6: Appendicular skeleton

Pectoral Girdle

Attaches arm to body1. Clavicle: Collarbone. S-shaped. Articulates

with the manubrium of sternum and scapula2. Scapula: Shoulder blade. Thin, flat triangular

bone. Articulates with clavicle and humerus. Has a bony ridge for muscle attachment

Page 7: Appendicular skeleton

Upper Extremity1. Humerus: Between shoulder and elbow.

Articulates with the scapula, ulna and radius

Page 8: Appendicular skeleton

Upper Extremity1. Humerus: Between shoulder and elbow.

Articulates with the scapula, ulna and radius2. Ulna: On the pinky side of the forearm.

Longer than the radius. Forms the point of the elbow

Page 9: Appendicular skeleton

Upper Extremity1. Humerus: Between shoulder and elbow.

Articulates with the scapula, ulna and radius2. Ulna: On the pinky side of the forearm.

Longer than the radius. Forms the point of the elbow

3. Radius: On the thumb side of the forearm. Crosses over the ulna when the hand is turned over

Page 10: Appendicular skeleton

Upper Extremity1. Humerus: Between shoulder and elbow.

Articulates with the scapula, ulna and radius2. Ulna: On the pinky side of the forearm.

Longer than the radius. Forms the point of the elbow

3. Radius: On the thumb side of the forearm. Crosses over the ulna when the hand is turned over

4. Carpals: 8 bones arranged in 2 rows. Form the wrist

Page 11: Appendicular skeleton

Upper Extremity1. Humerus: Between shoulder and elbow.

Articulates with the scapula, ulna and radius2. Ulna: On the pinky side of the forearm. Longer

than the radius. Forms the point of the elbow3. Radius: On the thumb side of the forearm.

Crosses over the ulna when the hand is turned over

4. Carpals: 8 bones arranged in 2 rows. Form the wrist

5. Metacarpals: 5 bones, one in line with each finger. Form the hand

Page 12: Appendicular skeleton

Upper Extremity1. Humerus: Between shoulder and elbow.

Articulates with the scapula, ulna and radius2. Ulna: On the pinky side of the forearm. Longer

than the radius. Forms the point of the elbow3. Radius: On the thumb side of the forearm. Crosses

over the ulna when the hand is turned over4. Carpals: 8 bones arranged in 2 rows. Form the

wrist5. Metacarpals: 5 bones, one in line with each finger.

Form the hand6. Phalanges: 14 bones (3 in each finger, 2 in thumb)

Page 13: Appendicular skeleton

Pelvic girdle

• Attaches leg to body

Page 14: Appendicular skeleton

Pelvic girdle

• Attaches leg to body• Consists of 2 coxal (hip) bones

Page 15: Appendicular skeleton

Pelvic girdle

• Attaches leg to body• Consists of 2 coxal (hip) bones• Articulate posteriorly with the sacrum and

anteriorly with each other at the symphysis pubis

Page 16: Appendicular skeleton

Pelvic girdle

• Attaches leg to body• Consists of 2 coxal (hip) bones• Articulate posteriorly with the sacrum and

anteriorly with each other at the symphysis pubis

• Each coxal bone has 3 parts1. Ilium: largest part. Wing-shaped

Page 17: Appendicular skeleton

Pelvic girdle

• Attaches leg to body• Consists of 2 coxal (hip) bones• Articulate posteriorly with the sacrum and

anteriorly with each other at the symphysis pubis• Each coxal bone has 3 parts

1. Ilium: largest part. Wing-shaped2. Ischium: Posterior portion. Sitting bones

Page 18: Appendicular skeleton

Pelvic girdle

• Attaches leg to body• Consists of 2 coxal (hip) bones• Articulate posteriorly with the sacrum and

anteriorly with each other at the symphysis pubis• Each coxal bone has 3 parts

1. Ilium: largest part. Wing-shaped2. Ischium: Posterior portion. Sitting bones3. Pubis: lower, anterior portion

Page 19: Appendicular skeleton

Lower Extremity1. Femur: largest, longest, strongest bone in the

body

Page 20: Appendicular skeleton

Lower Extremity1. Femur: largest, longest, strongest bone in the

body2. Tibia: On the medial side of the leg. Larger

than the fibula. Articulates with femur to form knee joint

Page 21: Appendicular skeleton

Lower Extremity1. Femur: largest, longest, strongest bone in the

body2. Tibia: On the medial side of the leg. Larger

than the fibula. Articulates with femur to form knee joint

3. Fibula: Slender bone on lateral side

Page 22: Appendicular skeleton

Lower Extremity1. Femur: largest, longest, strongest bone in the

body2. Tibia: On the medial side of the leg. Larger

than the fibula. Articulates with femur to form knee joint

3. Fibula: Slender bone on lateral side4. Patella: Kneecap. Flat triangular bone

enclosed within the tendon that attaches the thigh muscles to the tibia. Protects the knee joint

Page 23: Appendicular skeleton

Lower Extremity1. Femur: largest, longest, strongest bone in the

body2. Tibia: On the medial side of the leg. Larger

than the fibula. Articulates with femur to form knee joint

3. Fibula: Slender bone on lateral side4. Patella: Kneecap. Flat triangular bone

enclosed within the tendon that attaches the thigh muscles to the tibia. Protects the knee joint

5. Tarsals: 7 bones that form the ankle. Largest is the calcaneus (heel) bone

Page 24: Appendicular skeleton

Lower Extremity1. Femur: largest, longest, strongest bone in the

body2. Tibia: On the medial side of the leg. Larger than

the fibula. Articulates with femur to form knee joint

3. Fibula: Slender bone on lateral side4. Patella: Kneecap. Flat triangular bone enclosed

within the tendon that attaches the thigh muscles to the tibia. Protects the knee joint

5. Tarsals: 7 bones that form the ankle. Largest is the calcaneus (heel) bone

6. Metatarsals: 5 bones that form the instep and ball of the foot

Page 25: Appendicular skeleton

Lower Extremity1. Femur: largest, longest, strongest bone in the body2. Tibia: On the medial side of the leg. Larger than the

fibula. Articulates with femur to form knee joint3. Fibula: Slender bone on lateral side4. Patella: Kneecap. Flat triangular bone enclosed

within the tendon that attaches the thigh muscles to the tibia. Protects the knee joint

5. Tarsals: 7 bones that form the ankle. Largest is the calcaneus (heel) bone

6. Metatarsals: 5 bones that form the instep and ball of the foot

7. Phalanges: 14 bones. 3 in each toe, except big toe (hallux) which has 2