Human Anatomy: Why Your Left Lung Is Smaller
A head-to-toe tour of the body's structure, from the language anatomists use to the bones, muscles, nerves and vessels that make it work.
Try 3 questions
1. In standard anatomical position, which way do the palms face?
- Inward, flat against the thighs
- Forward, thumbs pointing outward
- Backward, thumbs pointing inward
Show the answer
Answer: Forward, thumbs pointing outward
Anatomical position is standing upright, arms at the sides, palms forward; every direction term is defined from this pose so descriptions never depend on how a person is lying.
2. On an X-ray or anatomy diagram, 'left' refers to whose left?
- The patient's own left
- The viewer's own left
- Whichever side faced the film
Show the answer
Answer: The patient's own left
Anatomical left and right always mean the patient's sides, so on a front-facing image the patient's left appears on the viewer's right.
3. A CT scan shows the body in horizontal slices, like a loaf of bread. Which anatomical plane is that?
- The coronal plane
- The sagittal plane
- The transverse plane
Show the answer
Answer: The transverse plane
Transverse (axial) planes cut the body into upper and lower parts; sagittal planes divide left from right and coronal planes divide front from back.
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