The HESI A2 A&P section is where most applicants gain or lose points. What it covers, how to study it by system, and where people go wrong.
If your nursing program uses the HESI A2 and includes the Anatomy and Physiology section, that section will probably decide your composite. Math and reading tend to be steady. A&P is where scores swing, because it rewards recall you either have or you do not. The upside is that A&P is finite and predictable, so it responds well to focused study.
Why A&P carries so much weight
A&P asks you to know how the body is built and how it runs. There is no reasoning trick that saves you if you do not know where the mitral valve sits or what the loop of Henle does. That sounds harsh, but it is actually reassuring: the content does not shift, so time spent studying converts directly into points. Programs also lean on this section because it predicts how you will handle the science-heavy first year of nursing school.
Confirm your program's sections first
The HESI A2 is modular. Your school picks which sections you sit, and not every program includes A&P (some use Biology, Chemistry, or both instead). Check your requirements before you build a study plan, so you weight your time correctly.
What the A&P section tends to cover
Questions range across the major body systems. You do not need graduate-level depth. You need solid, first-pass knowledge of structure and function for each system.
| System | High-frequency topics |
|---|---|
| Cardiovascular | Heart chambers and valves, blood flow path, blood vessels |
| Respiratory | Gas exchange, lung structures, breathing mechanics |
| Musculoskeletal | Major bones and muscles, joint types |
| Nervous | Neuron basics, CNS vs PNS, brain regions |
| Renal / urinary | Nephron function, fluid and electrolyte balance |
| Endocrine | Major glands and the hormones they release |
| Digestive | Organs of digestion and what each one does |
10+
body systems can appear on the A&P section, so breadth beats deep mastery of any single one
Study by system, not by flashcard pile
The mistake people make is memorizing loose facts with no structure. Anatomy sticks when you attach it to a system and a function. Take one system per study block. Learn its parts, then learn what those parts do, then quiz yourself on both directions: name the structure, then state its job.
- Draw it once. Sketching blood flow through the heart, or the path of a nerve signal, cements it better than rereading.
- Pair structure with function every time. "Alveoli" is half a fact. "Alveoli, where gas exchange happens" is the whole one, and the whole one is what gets tested.
- Front-load your weakest system. Most people are lopsided. Find the system you avoid and start there.
Where applicants lose points
Two patterns cost people. First, spreading study evenly across strong and weak systems, which feels productive but changes nothing. Second, learning names without functions, which fails the moment a question asks what a structure does rather than what it is called. Fix both by diagnosing your weak systems early and drilling structure-and-function together.
When you are ready to move from reading to recall, drill HESI A2 questions with rationales in the HESI A2 practice resources, and check the score you are actually aiming for so you study toward a real target instead of a vague "do well." A&P looks intimidating because it is broad. Broad is a scheduling problem, not a talent problem, and you can plan your way through it.
