Free HESI A2 Anatomy and Physiology guide
October 2026 - Anatomical Terminology Study Guide for nursing students in
Anatomical terminology gives every body relationship a fixed reference point. Directional terms, planes and regions are interpreted from anatomical position, so they remain precise regardless of how a patient or diagram is turned.
Core ideas to know
Learn the relationships, not a string of isolated definitions. These are the facts that let you reason through unfamiliar wording.
- Anatomical position is standing upright, facing forward, arms at the sides and palms facing forward.
- Superior/inferior compare vertical position; anterior/posterior compare front and back.
- Medial/lateral compare distance from the midline; proximal/distal compare distance from a limb’s attachment.
- A sagittal plane divides left and right, a frontal plane anterior and posterior, and a transverse plane superior and inferior.
- Superficial/deep compare distance from the body surface; the terms do not describe severity.
A reliable way to answer
Use the same short process every time so the wording of the question does not decide your method for you.
- Mentally place the body in anatomical position before reading the relationship.
- Identify whether the structures are compared along a vertical, front–back, midline, limb or depth axis.
- Choose the matching pair of opposites and state the relationship in both directions.
- For planes, name the portions produced rather than relying on the drawing’s orientation.
Distinctions that earn marks
| Idea | What it means | Do not confuse it with |
|---|---|---|
| Medial | Closer to the midline | Lateral, farther from the midline |
| Proximal | Closer to a limb’s attachment | Distal, farther from its attachment |
| Sagittal plane | Divides left and right | Frontal plane, divides front and back |
Read every word in the stem before choosing. HESI distractors are often true statements that answer a nearby question rather than the one that was asked.
Terms to know
- Ipsilateral
- On the same side of the body.
- Contralateral
- On opposite sides of the body.
- Midsagittal
- A plane dividing the body into equal left and right halves.
Key points
- All directional terms assume anatomical position.
- Proximal and distal are most useful along limbs or branching structures.
- Name a plane from the body portions it creates, not the angle of the page.
Review quiz
3 questions on this topic, each with the reasoning worked through. Pick an answer to see how it went, or open the explanation straight away.
-
Question 1 of 3
In anatomical position, the thumb is _____ to the little finger.
Show the answer and explanation
Correct answer: B. lateral
With palms facing forward, the thumb lies farther from the body’s midline than the little finger and is therefore lateral to it.
-
Question 2 of 3
The elbow is _____ to the wrist.
Show the answer and explanation
Correct answer: C. proximal
The elbow lies closer than the wrist to the upper limb’s attachment at the shoulder, making the elbow proximal to the wrist.
-
Question 3 of 3
Which plane divides the body into anterior and posterior portions?
Show the answer and explanation
Correct answer: C. Frontal
A frontal, or coronal, plane separates front from back. Sagittal separates left and right, while transverse separates superior and inferior portions.
Put this HESI topic into practice
Build a set on anatomical terminology and use the rationale on every question to reinforce what you just reviewed.
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