AN1.1-2 | Anatomical terminology — Part 3

SELF-CHECK — Self-Check 2 — Bone Composition and Marrow

A child with vitamin C deficiency (scurvy) has bones that fracture easily despite normal calcium levels. This is because vitamin C is essential for collagen synthesis. Which component of bone is primarily affected?

A. Hydroxyapatite

B. Collagen (organic matrix)

C. Yellow bone marrow

D. Haematopoietic stem cells

In a patient with severe aplastic anaemia, which marrow conversion would you expect to occur?

A. Red marrow converts to yellow marrow in flat bones

B. Yellow marrow converts back to red marrow in long bones

C. Haematopoiesis moves to the liver only

D. Medullary cavity fills with spongy bone