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11 multiple-choice questions and 5 flashcards on Cardiovascular System (Heart and Blood Vessels), about 7% of the HS Anatomy & Physiology bank. Every one carries a written rationale.
Cardiovascular System (Heart and Blood Vessels) is one of 13 chapters in CoStudy's HS Anatomy & Physiology bank, and it holds 11 of the bank's 150 multiple-choice questions — roughly 7% 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.
6 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.
The largest organ of the body is:
Answer: D — Skin (integumentary system) — protects, regulates temperature, sensory input, vitamin D synthesis
Skin: largest organ by area (~2 m²) and weight (~16% body weight). Layers: epidermis, dermis, hypodermis (subcutaneous). Functions: barrier, thermoregulation, sensation, vitamin D synthesis, excretion. Integumentary system.
A person with type O⁻ blood is considered:
Answer: C — Universal donor (RBCs)
C) O⁻ has no A, B, or Rh antigens, so RBCs are accepted by any ABO/Rh recipient. A) AB⁺ is universal recipient (opposite). B/D) Incorrect by ABO/Rh logic.
The cerebral cortex's frontal lobe is most associated with:
Answer: C — Executive function, voluntary movement, and decision-making
The frontal lobe handles executive function, planning, motor control (primary motor cortex), and personality. Occipital = vision; temporal = hearing; cerebellum = balance.
Which valve separates the left atrium from the left ventricle?
Answer: D — Mitral (bicuspid) valve
D) Mitral/bicuspid sits on the left AV. A) Tricuspid is the right AV valve (off-by-one trick). B/C) Are semilunar valves at the ventricular outflows, not between atrium and ventricle.
Which blood vessel type carries blood away from the heart?
Answer: D — Arteries
Arteries carry blood from the heart (oxygenated except pulmonary artery). Veins return blood to the heart. Capillaries are tiny exchange vessels.
Pulmonary circulation carries blood from the heart to:
Answer: B — The lungs and back, for gas exchange
B) Right ventricle → pulmonary artery → lungs → pulmonary veins → left atrium. A/C/D) Systemic-circulation destinations.
4 cards from the 5 in this chapter.
Liver's main functions?
Detoxification, bile production (digests fats), nutrient processing, protein synthesis (albumin, clotting factors), glucose storage (glycogen).
Digestive system path?
Mouth → esophagus → stomach → small intestine → large intestine → rectum → anus. Plus accessory organs (liver, pancreas, gallbladder).
Pancreas roles?
Endocrine (insulin/glucagon — blood sugar). Exocrine (digestive enzymes into small intestine).
Where most nutrient absorption happens?
Small intestine — villi/microvilli increase surface area massively.
These are a sample. The full Cardiovascular System (Heart and Blood Vessels) chapter runs 16 items with per-chapter progress tracking, on the web and in the iOS app.
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