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The femur (thigh bone).

Femur

The femur (thigh bone).

A femur sawed lengthwise.

A Femur

A femur sawed lengthwise.

Here you see the thigh bone on the left and the arm bone on the right. In both, the shaft is hollow, while the large ends are more dense. In the living bone, bone marrow is found in the hollow area which serves in blood cell production.

Thigh Bone and Arm Bone

Here you see the thigh bone on the left and the arm bone on the right. In both, the shaft is hollow,…

Rear view of the thigh bone.

Rear View of the Thigh Bone

Rear view of the thigh bone.