Keeping an anatomy question attached to the part of the image you mean
A study workflow for anyone working with public sample scans: open a slice, save a screenshot, circle the structure you're trying to understand, and put your question beside it. That gives a classmate or instructor something specific to explain.
I'm the creator of two Android apps that cover those steps. Soupy Image Explorer opens compatible DICOM and NIfTI files for educational exploration. Soupy Talk&Tag lets you mark up a picture and keep your explanation with it.
Image Explorer's 2D viewer is free, with optional paid Pro tools. Talk&Tag is $2.99 in the US. The links are in the posts on my profile if interested.
Use public samples you have permission to use. Image Explorer is experimental and educational only, not for diagnosis or clinical decisions. Please don't share private scans here.