Which term means the bone shaft between epiphyses?

Which term means the bone shaft between epiphyses?

• A. Epiphysis
• B. Endosteum
• C. Diaphysis
• D. Perichondrium

Answer: (C)

The main concept here is long-bone anatomy: the shaft between the two ends is called the diaphysis. This central, tubular portion is typically made up mainly of compact bone and houses the medullary (bone marrow) cavity, giving the bone strength and a light, lever-like framework. The ends of a long bone are the epiphyses, which are separated from the shaft by the metaphysis in growing bones. The inner lining of bone cavities is the endosteum, while the tissue that surrounds cartilage is the perichondrium. Knowing these terms helps you quickly identify which part refers to the shaft versus the ends or surrounding membranes.

The main concept here is long-bone anatomy: the shaft between the two ends is called the diaphysis. This central, tubular portion is typically made up mainly of compact bone and houses the medullary (bone marrow) cavity, giving the bone strength and a light, lever-like framework. The ends of a long bone are the epiphyses, which are separated from the shaft by the metaphysis in growing bones. The inner lining of bone cavities is the endosteum, while the tissue that surrounds cartilage is the perichondrium. Knowing these terms helps you quickly identify which part refers to the shaft versus the ends or surrounding membranes.