How to keep well : a text-book of health for use in the lower grades of schools with special reference to the effects of alcholic drinks, tobacco and other narcotics on the bodily life . Fig. 4. — Section of Bone as it looks under the Microscope, showing Openings of Canals. THE BONY FRAMEWORK 15 the bones of the arm and the leg; while others areshort, as the bones of the fingers and the toes. Someare flat, to cover exposed places, like the knee-pan andshoulder-blades ; while others are of various odd shapes,as the bones of the ankle and wrist, and the backbone. 11. The Head. — The skeleton, or
How to keep well : a text-book of health for use in the lower grades of schools with special reference to the effects of alcholic drinks, tobacco and other narcotics on the bodily life . Fig. 4. — Section of Bone as it looks under the Microscope, showing Openings of Canals. THE BONY FRAMEWORK 15 the bones of the arm and the leg; while others areshort, as the bones of the fingers and the toes. Someare flat, to cover exposed places, like the knee-pan andshoulder-blades ; while others are of various odd shapes,as the bones of the ankle and wrist, and the backbone. 11. The Head. — The skeleton, or bony framework ofthe house we live in,—a house far more wonderful thanany kings palace, since it can walk, and has livingwalls, — consists of the bonesof the head, the trunk, and thelimbs. The bones of the headmake a very strong box, com-monly called the skull. Whenwe speak of the head we meanthe head and the face. The top part of the head,which is sometimes called thebrain-case, is a kind of bonyshell which holds the brain. Itmade up of several bones. is Fig. 5. — Cross Section of Bone,highly magnified; the Canalsare left white. Put your hand on the tightly locked together at the seams by something like the dovetailing used by a carpenter. head of a babe, just above the forehead, and you will find a soft space, called a little fountain. Why is this ? Simply because, in very young children, these bones,which grow on their edges, do not yet meet, and thethrobbing of the brain is easily seen and felt throughthe thin scalp. Now, as the bones of a childs headare thus dovetailed into each other, they yield a little,and do not break, even if he tumbles and bumps hishead every day. 16 HOW TO KEEP WELL All the bones of the head, except the lower jaw, —the only movable bone of the head, — are firmlylocked together by these dovetailed stitches, or suturesas they are called. The dome shape of the skull makesit stronger. We are now able to understand better how the headoften
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecthygiene, bookyear1901
