Bone marrow seen with low power (to the left). This marrow cavity lies within a shaft of compact bone (middle, pink band). Attaching muscle is to the right.

• 低被镜观察骨髓（图左），骨髓腔位于密质骨（骨干，图中粉红色带状），骨干右侧为附着的骨骼肌。