It's difficult to definitively say which cell is the *shortest* in the human body. Cell size can vary significantly depending on several factors:

* Cell type: Different types of cells have different functions and therefore different sizes.

* Stage of development: Cells can grow and shrink throughout their life cycle.

* Environmental factors: Things like nutrition and stress can affect cell size.

However, some of the smallest cell types in the human body include:

* Red blood cells: These are responsible for carrying oxygen throughout the body and are about 7-8 micrometers in diameter.

* Platelets: These are tiny cell fragments that help with blood clotting and are about 2-4 micrometers in diameter.

Keep in mind that these are just *general estimations*. It's important to remember that cell size is complex and can vary widely.