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Skeletal System — HS Anatomy & Physiology practice questions

12 multiple-choice questions and 87 flashcards on Skeletal System, about 8% of the HS Anatomy & Physiology bank. Every one carries a written rationale.

Written and maintained by the CoStudy team · last updated 2026-10-02 · how we write and review questions

What this chapter covers

Skeletal System is one of 13 chapters in CoStudy's HS Anatomy & Physiology bank, and it holds 12 of the bank's 150 multiple-choice questions — roughly 8% of the total. That proportion is not arbitrary: chapters follow the certifying body's published exam outline, and the number of questions in each is set by that domain's published weight, so the share of your practice time this chapter takes matches the share of the real exam it accounts for.

Studying by chapter is worth doing once you have a diagnostic score. A single overall percentage tells you whether you are close; it does not tell you which domain is dragging. Working a weak chapter in isolation, and re-testing it in isolation, is the fastest way to move a score that has stalled — and it is why the mock exams in CoStudy report by domain rather than as one number.

Free Skeletal System practice questions

3 questions drawn from this chapter, with the full rationale shown — the controlling principle behind the right answer, and why each wrong option tempts and fails.

Lengthwise growth of a long bone happens at the:

  1. diaphysis (shaft)
  2. epiphyseal (growth) plate
  3. periosteum (outer covering)
  4. medullary (marrow) cavity

Answer: B — epiphyseal (growth) plate

B) Correct — Cartilage there grows and is replaced by bone until adulthood. A) The shaft grows wider, not longer. C) This outer membrane adds width. D) Is the hollow center holding marrow.

An adult skeleton has about how many bones?

  1. 206
  2. 270
  3. 106
  4. 306

Answer: A — 206

A) Correct — A newborn has about 270; many fuse during growth. B) Is the approximate number at birth. C) Is roughly half the adult number. D) Is 100 too many.

In adults, blood cells are made mainly in:

  1. yellow bone marrow
  2. the liver
  3. the spleen
  4. red bone marrow

Answer: D — red bone marrow

D) Correct — It is found in flat bones and the ends of long bones. A) Is mostly fat. B) Makes blood cells in the fetus, not normally in adults. C) Filters blood and removes old red blood cells.

Skeletal System flashcards

4 cards from the 87 in this chapter.

Spine — identify the highlighted vertebra.

L3 — third lumbar vertebra. Approximate level of the umbilicus. A common site for lumbar puncture (needle inserted between L3 and L4 spinous processes). Kidneys sit around the T12–L3 range in most adults.

Spine — identify the highlighted vertebra.

C7 (vertebra prominens) — seventh and last cervical vertebra. Has a distinctively long, non-bifid spinous process you can feel at the base of the neck (the most prominent bump). Often used as a landmark for counting vertebrae during physical exams.

Number of bones in adult?

206. Babies have ~270 (some fuse).

Identify this bone.

Cranium — the skull's brain case. 8 fused bones: frontal, parietal (2), temporal (2), occipital, sphenoid, ethmoid. Protects the brain.

Practise the full chapter

These are a sample. The full Skeletal System chapter runs 99 items with per-chapter progress tracking, on the web and in the iOS app.

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