Microscopic Skeletal System

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Osteoblasts are cells responsible for building up bone.

The skeletal system supports and protects the body, allows movement, and produces red blood cells.

Lamellae are thin layers of bone matrix that form the structure of compact bone.

The pelvic girdle is a bony structure that connects the spine to the lower limbs and supports the weight of the upper body.

Red bone marrow, found in certain bones, is responsible for producing red blood cells.

Compact bone is dense and forms the outer layer of bones, while spongy bone is lighter and contains spaces filled with marrow.

Osteoclasts are cells that break down bone tissue, helping to regulate bone density.

The axial skeleton supports the head, neck, and trunk, and protects the brain, spinal cord, and thoracic organs.

The appendicular skeleton includes the limbs and the girdles (shoulder and pelvic girdles) that attach them to the axial skeleton.