# Model Nodes

- [Anatomy Model](https://docs.procedural-anatomy.com/build-your-first-character/model-nodes/anatomy-model.md): This is where your model and animation skeleton are setup.
- [Anatomy Skeleton](https://docs.procedural-anatomy.com/build-your-first-character/model-nodes/anatomy-skeleton.md): Where the skeleton model is created.
- [Anatomy Muscle](https://docs.procedural-anatomy.com/build-your-first-character/model-nodes/anatomy-muscle.md): The Muscle node creates the geometry muscle shapes as well as collision meshes for them.
- [Anatomy Volume](https://docs.procedural-anatomy.com/build-your-first-character/model-nodes/anatomy-volume.md): This node uses the negative space between the Muscle Shape Mesh and Volume Shape to create meshes for fat and breast tissue.
- [Anatomy Output](https://docs.procedural-anatomy.com/build-your-first-character/model-nodes/anatomy-output.md): This node is designed to output all created meshes as a single package if used inside Houdini.