What is the thin inner lining of a long bone called that consists of connective tissue that covers the trabeculae of spongy bone and is osteogenic?

The thin inner lining of a long bone that consists of connective tissue, covers the trabeculae of spongy bone, and is osteogenic is called the endosteum.

Here are the steps to answer this question:

1. Understand the question: The question is asking for the name of the thin inner lining of a long bone, which has specific characteristics such as being made of connective tissue, covering the trabeculae of spongy bone, and having the ability to form new bone tissue (osteogenic).

2. Recall knowledge about bone anatomy: In the anatomy of a long bone, there are two linings - the outer surface is covered by the periosteum, and the inner surface is lined by the endosteum.

3. Match the characteristics: The endosteum matches the description given in the question - it is a thin layer of connective tissue that lines the inner surface of the bone, covering the trabeculae of spongy bone in the marrow cavity. It also contains osteogenic cells, which are capable of forming new bone tissue.

4. Answer the question: Therefore, the thin inner lining of a long bone that consists of connective tissue, covers the trabeculae of spongy bone, and is osteogenic is called the endosteum.