Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

6. Bones & Skeletal Tissue

Gross Anatomy of Bone: Periosteum and Endosteum

Anatomy & Physiology

6. Bones & Skeletal Tissue

Gross Anatomy of Bone: Periosteum and Endosteum

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3:50 minutes

Problem 3

Textbook Question

The membrane found wrapping the bones, except within the joint cavity, is the:
(a) Periosteum
(b) Endosteum
(c) Perforating fibers
(d) A, b, and c are correct

Verified step by step guidance

Step 1: Understand the question. The problem is asking about the membrane that wraps around bones, excluding the joint cavity. This requires knowledge of bone anatomy and the specific structures associated with it.

Step 2: Recall the definition of the periosteum. The periosteum is a dense layer of vascular connective tissue that covers the outer surface of bones, except at the joints where articular cartilage is present.

Step 3: Recall the definition of the endosteum. The endosteum is a thin membrane that lines the inner surface of the bone, including the medullary cavity, and is not involved in wrapping the outer surface of the bone.

Step 4: Recall the role of perforating fibers (Sharpey's fibers). These fibers are collagen fibers that anchor the periosteum to the underlying bone but are not a membrane themselves.

Step 5: Analyze the options. Based on the definitions, the periosteum is the correct answer as it wraps the bone's outer surface (excluding the joint cavity). The endosteum and perforating fibers do not fulfill this role.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Periosteum

The periosteum is a dense layer of vascular connective tissue that envelops the bones, except at the surfaces of the joints. It serves as an attachment point for muscles and tendons, provides nourishment to the bone, and plays a crucial role in bone growth and repair.

Endosteum

The endosteum is a thin membrane that lines the inner surface of the bone, including the medullary cavity. It contains osteoblasts and osteoclasts, which are essential for bone remodeling and growth, and helps in the maintenance of bone health.

Perforating Fibers

Perforating fibers, also known as Sharpey's fibers, are collagen fibers that anchor the periosteum to the underlying bone. They provide structural support and stability, ensuring that the periosteum remains firmly attached to the bone surface during movement and stress.