65 The Tibia Also called the shinbone Supports body weight Larger than fibulaMedial to fibula
66 Tibia: The Proximal Epiphysis Medial and lateral tibial condyles:separated by intercondylar eminencearticulate with medial and lateral condyles of femurTibial tuberosity:attaches patellar ligament
67 Tibia: The ShaftAnterior margin:sharp ridge of shinbone
68 Tibia: The Distal Epiphysis Medial malleolus:medial projection at the ankle
69 The Fibula Attaches muscles of feet and toes Smaller than tibia Lateral to tibia
70 Fibula: Articulations with Tibia Lateral malleolus:lateral projection of ankle
71 The Ankle Also called the tarsus: consists of 7 tarsal bones Figure 8–14a
72 Bones of the Ankle Talus: Calcaneus (heel bone): carries weight from tibia across trochleaCalcaneus (heel bone):transfers weight from talus to groundattaches Achilles tendon
73 Feet: Metatarsal Bones 5 long bones of footNumbered I–V, medial to lateralArticulate with toes
74 Feet: Phalanges Phalanges: Hallux: Other 4 toes: bones of the toes big toe, 2 phalanges (distal, proximal)Other 4 toes:3 phalanges (distal, medial, proximal)
75 Feet: Arches Arches transfer weight from 1 part of the foot to another Figure 8–14b
76 Feet: The Transverse Arch Formed by a difference in curvature between medial and lateral borders of the foot
77 KEY CONCEPTPectoral girdle is highly mobile, stabilized primarily by musclesPelvic girdle is more massive, stronger, and less mobile
78 How does the skeleton reveal significant information about an individual?
79 Studying the Skeleton Reveals characteristics: muscle strength and mass (bone ridges, bone mass)medical history (condition of teeth, healed fractures)sex and age (bone measurements and fusion)body size
80 What are the skeletal differences between males and females?