Here's why:

* Gross Anatomy: This branch of anatomy studies the structures of the body that are visible to the naked eye. You wouldn't need a microscope for this.

* Microscopic Anatomy (Histology): This branch of anatomy focuses on the tissues and cells that make up the body. This requires the use of microscopes to see the minute details.

* Ultrastructure: This level of anatomy goes even deeper, examining the internal structures of cells using specialized electron microscopes.

So, while a basic understanding of anatomy can be gained without microscopes, studying the intricate details of tissues, cells, and their internal components requires the use of various microscopy techniques.