ClipArt ETC
The thigh bone cut through the middle. Labels: b, hard bone; h and d, spongy bone; ma, marrow.

Femur

The thigh bone cut through the middle. Labels: b, hard bone; h and d, spongy bone; ma, marrow.

The thigh bone cut through the middle. Labels: b, hard bone; h, d, spongy bone; ma, marrow.

Thigh Bone

The thigh bone cut through the middle. Labels: b, hard bone; h, d, spongy bone; ma, marrow.

The above cut represents a section of the thigh bone. The extremities (a, w) having a shell or thin plate of compact texture, crowded with small cells, diminishing in size, but increasing in number as they approach the articulation (c), the cavity for containing the marrow; the walls of the shaft are very firm and solid (b, b). The compact part is thickest near the middle of the bone where the greatest strength is required.

Thigh Bone Section

The above cut represents a section of the thigh bone. The extremities (a, w) having a shell or thin…