What is the main component of the inner layer of the periosteum?

The main component of the inner layer of the periosteum is primarily composed of elastic fibers, along with other connective tissue components. The inner layer, also known as the cambium layer, contains osteoblasts, which are essential for the formation of new bone tissue. Elastic fibers contribute to the flexibility and resilience of the periosteum, allowing it to adapt and respond to various stressors imposed on the bone during movement and loading.

In contrast, cartilage cells are found in cartilage rather than the periosteum, and bone marrow is a substance found within the medullary cavities of bones, not in the periosteum. Adipose tissue serves as a type of connective tissue that stores fat, but it does not comprise the primary structural makeup of the periosteum. Understanding the composition and function of the inner layer helps clarify its role in bone health and maintenance.