. Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. 638 Biology of the Vertebrates The horse's ancestral gallery of family portraits shows all intermediate degrees of evolution from the five toes of Eohippus to the single toe of the modern horse. Flat-footed man would have a long road to travel before he reached the extreme stage of pedal evolution attained by the horse. The bones of the human foot are arranged in the form of two arches, which act as springs or shock absorbers in locomotion. They also prote
. Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. 638 Biology of the Vertebrates The horse's ancestral gallery of family portraits shows all intermediate degrees of evolution from the five toes of Eohippus to the single toe of the modern horse. Flat-footed man would have a long road to travel before he reached the extreme stage of pedal evolution attained by the horse. The bones of the human foot are arranged in the form of two arches, which act as springs or shock absorbers in locomotion. They also protect from pressure the nerves and blood vessels of the sole. The long arch rests upon the ground both at the heel and upon the ball of the foot or, in terms of the skeleton, upon the posterior end of the calcaneus and the distal ends of the metatarsals (Fig. 573). It has for a keystone the talus, or astragalus, which bears the weight of the body and is the only bone of the foot that articulates with the shank of the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Walter, Herbert Eugene, b. 1867; Sayles, Leonard Perkins, 1902-. New York : Macmillan Co.
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