The human body A beginner's text-book of anatomy, physiology and hygiene .. . erefore childrenshould never be kept sitting on a bench so high that thefeet are not supported. If this precaution be neglectedthe thigh-bones become bent over the edge of the seatby the weight of the rest of the limb and may be madecrooked for life. 7. What parts of the dead body decay most slowly ? How mayliving bone be altered in form ? Illustrate. 8. Why should the feet of children be supported when sitting?Why is it important to sit straight ? Why shcruld children not beencouraged to walk too soon ? THE INSTEP.
The human body A beginner's text-book of anatomy, physiology and hygiene .. . erefore childrenshould never be kept sitting on a bench so high that thefeet are not supported. If this precaution be neglectedthe thigh-bones become bent over the edge of the seatby the weight of the rest of the limb and may be madecrooked for life. 7. What parts of the dead body decay most slowly ? How mayliving bone be altered in form ? Illustrate. 8. Why should the feet of children be supported when sitting?Why is it important to sit straight ? Why shcruld children not beencouraged to walk too soon ? THE INSTEP. 29 For the same reason it is important to sit square andstraight at the table when writing or drawing, and withthe shoulders level: otherwise the spinal column maybecome curved to one side. Young children should not be encouraged to walk tooearly, lest they grow bow-legged, their leg-bones notbeing stiff enough to bear the weight of the upper partof the body. 9. Usefulness of the Arch of the Instep.—The bones of thefoot (Fig. 10) are arranged to make a springy arch which. 1 Til CI3 sm 3 Fig. 10.—The skeleton of the foot. Ca, the heel-bone; C/, C//, C3, iV, some ofthe tarsal bones; Os^ the front end of the metatarsal bones; 7V», the surface whichmakes the ankle-joint with the tibia and fibula, and bears the weight of the bodyin standing and walking; M\^ metatarsal bone of the great toe. rests on the ground by the heel-bone, Ca^ behind, and bythe front ends, Os^ of the metatarsal bones in front. Onthe crown of the arch is the surface, Ta^ where the footjoins the leg at the ankle-joint. At this joint the weightof the body is borne. The many small bones in the archglide over one another a little when the crown of thearch is pressed upon; but spring back into place whenthe pressure is removed. This elastic arch of the foot 9. Describe the construction of the instep. Why is tt arched andelastic? To what may it be compared? How may we learn some-thing of the jarring saved us by t
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Keywords: ., bookcentury1800, bookdecade1, booksubjectphysiology, bookyear1884
