Lower back, loin, is described by which combining form?

Lower back, loin, is described by which combining form?

• A. Myel/o
• B. Lumb/o
• C. Edema
• D. Diagnosis

Answer: (B)

The main idea is naming the body region described by a combining form. The lower back or loin corresponds to the lumbar region, so the combining form lumb/o is used to express that area. It appears in terms like lumbar or lumbosacral, which specifically refer to the lower back. The other options don’t describe this region: myel/o relates to the spinal cord or bone marrow, edema means swelling, and diagnosis is the process of identifying disease. Since only lumb/o designates the lower back/loin region, it’s the correct choice.

The main idea is naming the body region described by a combining form. The lower back or loin corresponds to the lumbar region, so the combining form lumb/o is used to express that area. It appears in terms like lumbar or lumbosacral, which specifically refer to the lower back. The other options don’t describe this region: myel/o relates to the spinal cord or bone marrow, edema means swelling, and diagnosis is the process of identifying disease. Since only lumb/o designates the lower back/loin region, it’s the correct choice.