Читать книгу The House We Live In; or, The Making of the Body онлайн

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The pelvis.

The middle part of the body below the spinal column is called the pelvis. In this picture we see two curious bones. These are the hip bones. They are like the sills of a house, which, you know, are large and strong. There is a deep hole in each one as large as a toy teacup, which holds the round head of the leg bone. There are three bones in each leg, the same as in the arm, one from the hip to the knee, and two from the knee to the ankle, besides a funny little bone or cap which covers the knee. Then we come to the ankle bones and bones of the feet.

Helen: How do the bones stay in their proper places, mother? I should think they would fall apart.

Mother: They would if they were not tied together.

Elmer: But what are they tied with?

Bones of the leg and foot.

Mother: With strong white bands or cords called lig´a-ments. Perhaps you have seen them on the leg of a chicken. When a joint is “sprained,” that means the lig´a-ments are stretched or hurt in some way.

Amy: I should think the bones would get dry so they would squeak and rub hard against one another.