# Attribution and licenses

Corpus is a free educational site. The application code is © 2026 Yash Arora, all rights reserved.
The 3D models and the part definitions are derivative works and are published under
**Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)**, as required by their sources.

## 3D models

- **Z-Anatomy – The libre 3D atlas of anatomy** – CC BY-SA 4.0
  https://github.com/Z-Anatomy/Models-of-human-anatomy
  Design, 3D and anatomy by Gauthier Kervyn; Blender add-on by Marcin Zielinski; Unity development by Lluís Vinent.
- **BodyParts3D** – The Database Center for Life Science (DBCLS), Japan – CC BY-SA 2.1 Japan
  https://dbarchive.biosciencedbc.jp/en/bodyparts3d/download.html
  Original model by Kousaku Okubo. Z-Anatomy's meshes derive from this database.
- **Cranial Nerves and Foramina** – University of Dundee, CAHID – CC BY 4.0 (used as reference/adapted in Z-Anatomy).
- **"Brainder" and "White matter"** – University of Washington (used as reference/adapted in Z-Anatomy).

### Excluded on purpose

Z-Anatomy also incorporates two models under non-commercial licenses. Those structures are **removed** from
this site's exports so that everything published here is CC BY-SA compatible:

- "Anatomy of the Inner Ear" – University of Dundee School of Medicine – CC BY-NC-SA 4.0
  (cochlea, vestibule, semicircular canals and related structures)
- "Kidney" – Lissie Cowley – CC BY-NC 4.0
  (kidney, renal pelvis, intrarenal vessels)

The exact list of excluded objects is written to `build/export-report.json` on every export.

## Definitions

- **Wikipedia** – CC BY-SA 3.0. Definitions were collected by the Z-Anatomy project from Wikipedia articles.
  Most (about 1,970 of 2,270) link to their source article; the rest came without a link in the source
  file and are shown without one. They may contain errors; corrections welcome.

## Icons

- **Lucide** – ISC license – https://lucide.dev (search, menu, x, maximize, dice, book, camera; inlined in `src/ui/Dialog.tsx`)

## Changes made

Models were exported from Blender to glTF, deduplicated, welded, mesh-simplified (muscles, vessels, nerves) and
compressed with meshopt. Object names were preserved. Empty label objects, collection title text, and the
non-commercial structures above were removed.