Questions and Answers
What is the primary function of the endosteum?
What two layers make up the periosteum?
Fibrous periosteum and osteogenic periosteum
What is the role of the periosteum in bone growth?
Participates in bone growth and repair
The endosteum is a thick membrane that covers the outside of bones.
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Match the following bone membranes with their functions:
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Where is the endosteum located?
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Study Notes
Periosteum vs Endosteum
- Periosteum stimulates new bone formation on outer surfaces; endosteum promotes bone resorption on inner surfaces.
- Together, these processes help increase the diameter of the medullary canal and bone structure with age.
Periosteum
- It is a membrane consisting of a fibrous outer layer and a cellular inner layer.
- Functions to isolate surrounding tissues, provide pathways for blood vessels and nerves, and actively contribute to bone growth and repair.
- Comprised of two layers:
- Fibrous periosteum (outer layer) features densely packed cells, lymphatics, blood vessels, and nerve endings.
- Osteogenic periosteum (inner layer) directly contacts the bone surface.
Endosteum
- An incomplete cellular layer lining the marrow cavity of long bones.
- Active in processes of bone growth, repair, and remodeling; covers trabeculae of spongy bone and inner surfaces of central canals.
- Described as a thin vascular membrane of connective tissue surrounding the medullary cavity, crucial for nourishment and bone health.
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Description
Test your knowledge on the periosteum and endosteum with these flashcards. Explore the differences and functions of these important bone structures, including their roles in bone growth and resorption. Perfect for students of anatomy and physiology.
