Question

a long bone is covered externally with a sheath called the________, whereas the marrow cavity is lined with the________. epiphysis; diaphysis diaphysis; epiphysis compact bone; spongy bone periosteum; endosteum endosteum; periosteum

Explanation:

The outer - covering of a long bone is the periosteum, a dense fibrous membrane. The marrow cavity is lined with the endosteum, a thin membrane. Epiphysis and diaphysis are parts of a long bone, not coverings. Compact and spongy bone are types of bone tissue, not coverings for the outer and inner parts of a long bone respectively.

Answer:

D. periosteum; endosteum