. Anatomy of the woodchuck (Marmota monax). Woodchuck; Mammals. Chapter 2—The Skeleton Fig. 2-41. Left Fibula, caudal view. 1 articular facet, 2 head, 3 shaft, 4 lateral malleolus, 5 articular facet. lea, trochlea tali, that articulates with the cochlea of the tibia, and two plantar articular facets for artic- ulation with the calcaneus and proximal tarsal ses- amoid bone. Distally it has a rounded facet for ar- ticulation with the central tarsal bone. The calcaneus is the largest of the tarsal bones and lies caudolaterally on the plantar aspect of the tarsus. It has a large, caudodorsally dir
. Anatomy of the woodchuck (Marmota monax). Woodchuck; Mammals. Chapter 2—The Skeleton Fig. 2-41. Left Fibula, caudal view. 1 articular facet, 2 head, 3 shaft, 4 lateral malleolus, 5 articular facet. lea, trochlea tali, that articulates with the cochlea of the tibia, and two plantar articular facets for artic- ulation with the calcaneus and proximal tarsal ses- amoid bone. Distally it has a rounded facet for ar- ticulation with the central tarsal bone. The calcaneus is the largest of the tarsal bones and lies caudolaterally on the plantar aspect of the tarsus. It has a large, caudodorsally directed tuber, tuber calcanei, for the attachment of the extensor muscles of the ankle. In addition a medially direct- ed sustentaculum tali provides a gliding surface for the tendon of the deep digital flexor muscle. Dis- tally, the calcaneus has articular facets for the talus and fourth tarsal bone. The middle row of tarsal bones consists of the central tarsal bone, os tarsi centrale (os naviculare). It articulates proximally with the talus, medially with the first tarsal bone, laterally with the fourth tarsal bone, and distally with the first, second, and third tarsal bones. The distal row of tarsal bones consists of four bones, numbered from medial to lateral. The first tarsal bone, os tarsale I (os cuneiforme mediale), is elongated and forms the greater part of the medial border of the tarsus. It articulates prox- imally with the central tarsal bone, medially with the second tarsal bone, and distally with the first metatarsal bone. The second tarsal bone, os tarsale II (os cuneifor- me intermedium), is small and cuboidal in shape. It articulates proximally with the central tarsal bone,. Fig. 2-42. Hind paw, dorsal view. I-V = metatarsals, 1-5 = digits. 1 calcaneal tuber, 2 trochlea of the talus, 3 talus, 4 central tarsal bone (navicular), 5 fourth tarsal bone (cu- boideum), 6 third tarsal bone (lateral cuneiform), 7 fifth metatarsal, 8 proximal phalanx of fifth digit, 9 mi
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