Question

Question was provided via image upload.

Explanation:

Identify the visible question fragment

The visible text at the top reads: "long bone is covered externally with a sheath called...". Based on standard anatomical terminology, this question asks for the external and internal connective tissue coverings of a long bone. The full question is: "A long bone is covered externally with a sheath called the ________, whereas the internal surface is lined with a sheath called the ________."

Analyze the anatomical structures

We apply our knowledge of Long Bone Anatomy to identify these coverings:

• The external surface of a bone is covered by a tough, fibrous membrane called the periosteum.
• The internal surface of bone cavities (such as the medullary cavity) is lined with a thin vascular membrane called the endosteum.

Match with the given options

Let's evaluate the visible options:

• "diaphysis; epiphysis" (refers to regions of a long bone, not sheaths)
• "endosteum; periosteum" (reversed order)
• "epiphysis; diaphysis" (refers to regions)
• "compact bone; spongy bone" (refers to bone tissue types)
• "periosteum; endosteum" (correct order: external sheath is periosteum, internal lining is endosteum)

Answer:

• (A) diaphysis; epiphysis
• (B) endosteum; periosteum
• (C) epiphysis; diaphysis
• (D) compact bone; spongy bone
• (E) periosteum; endosteum (Correct answer)