Appendicular skeleton
Transcript of Appendicular skeleton
Appendicular Skeleton (pg 8)
Appendicular Skeleton (pg 8)
• 126 bones
Appendicular Skeleton (pg 8)
• 126 bones• Arms and legs plus the girdles that attach
them to the axial skeleton
Pectoral Girdle
Attaches arm to body
Pectoral Girdle
Attaches arm to body1. Clavicle: Collarbone. S-shaped. Articulates
with the manubrium of sternum and scapula
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
Upper Extremity1. Humerus: Between shoulder and elbow.
Articulates with the scapula, ulna and radius
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
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
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
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
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)
Pelvic girdle
• Attaches leg to body
Pelvic girdle
• Attaches leg to body• Consists of 2 coxal (hip) bones
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
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
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
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
Lower Extremity1. Femur: largest, longest, strongest bone in the
body
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
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
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
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
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
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