Coronal section through the left ankle joint, astragalus, and calcaneum.

Section Through Ankle Joint

Coronal section through the left ankle joint, astragalus, and calcaneum.

"A genus of plans of the natural order Leguminosae, sub-order Papilionaceae. The pod is more or less perfectly 2-celled. The leaves are pinnate, with a terminal leaflet. the species are numerous, natives chiefly of the temperate and colder parts of the Old World, shrubby, and often spiny, or unarmed and herbaceous." — Chambers' Encyclopedia, 1875

Astragalus

"A genus of plans of the natural order Leguminosae, sub-order Papilionaceae. The pod is more or less…

The left astragalus. A. Superior external view. B. Inferior internal view.

Astragalus

The left astragalus. A. Superior external view. B. Inferior internal view.

The right astragalus. A, Upper surface. B, Under surface. Labels: 1, groove for flex, long, hallucis; 2, internal tubercle; 3, trochlear surface for tibia; 4, body; 5, for articulation with internal malleolus; 6, head; 7, for articulation with internal malleolus; 8, neck; 9, for articulation with external malleolus; 10, surface against which the inferior tibio fibular ligament rests; 11, external tubercle; 12, external tubercle; 13, posterior, middle, and anterior facets for os calcis; 14, for articulation with navicular; 15, surface resting on inferior calcaneo-navicular ligament; 16, interosseous groove; 17, internal tubercle; 18, groove for the flexor longus hallucis.

Astragalus

The right astragalus. A, Upper surface. B, Under surface. Labels: 1, groove for flex, long, hallucis;…

The right astragalus. A, As seen from the outer side. B, As seen from the inner side. Labels: 1, external tubercle; 2, groove for flexor longus hallucis; 3, internal tubercle; 4, surface against which the inferior tibio-fibular ligament rests; 5, trochlea for tibia; 6, for articulation with external malleolus; 7, neck; 8, head; 9, for articulation with navicular; 10, interosseous groove; 11, anterior, middle, and posterior facets for os calcis; 12, body; 13, surface resting on internal calcaneo navicular ligament; 14, for articulation with navicular; 15, head; 16, neck; 17, trochlea for tibia; 18, for articulation with internal malleolus; 19, body; 20, impression for internal lateral ligament; 21, internal tubercle; 22, groove for flexor longus hallucis; 23, external tubercle; 24, interosseous groove; 25, posterior and middle facets for os calis.

Astragalus

The right astragalus. A, As seen from the outer side. B, As seen from the inner side. Labels: 1, external…

Right astragalus from above.

Astragalus from Above

Right astragalus from above.

Right astragalus from below.

Astragalus from Below

Right astragalus from below.

The ovary of astragalus is composed of several united carpels. Each carpel is divided into two cavities.

Cross Section of Nearly Ripe Pod of Astragalus

The ovary of astragalus is composed of several united carpels. Each carpel is divided into two cavities.

"The foot. a, calcaneum; b, astragalus; c, cuboid; d, metatarsal, of which there are five; e, phalanges, of which there are five; f, external cuneiform; g, middle cuneiform; h, scaphoid." -Foster, 1921

Foot Bones

"The foot. a, calcaneum; b, astragalus; c, cuboid; d, metatarsal, of which there are five; e, phalanges,…

The internal border of the skeleton of the foot.

Foot Skeleton

The internal border of the skeleton of the foot.

The external border of the skeleton of the foot.

Foot Skeleton

The external border of the skeleton of the foot.

Oblique section of the foot showing six synovial membranes.

Bones of the Foot

Oblique section of the foot showing six synovial membranes.

Joints of the right foot, from the back of the foot.

Joints of the Foot

Joints of the right foot, from the back of the foot.

"f., Femur; ti., tibia; fi., fibula; i., intermedium; t., tibiale (astragalus); f., fibulare (os calcis); c., centrale; 1-5, tarsalia bearing the corresponding digits with metatarsals (mt.) and phalanges (ph.)." -Thomson, 1916

Vertebrate Hind Limb

"f., Femur; ti., tibia; fi., fibula; i., intermedium; t., tibiale (astragalus); f., fibulare (os calcis);…