This app is so comprehensive that it's really hard to believe it's free! But it is!! It is Free!! ALL FREE!!!
This app is a fantastic reference of the human body. There is information on EVERY part of the human body, from muscle structures to bones, to different body systems - including the nervous system, it's just jam-packed with data.
The app has pictures of the various body structures and parts, all of which can be zoomed in on. There are even 3D rotational models. The different aspects of these parts have pins. When a pin is pressed, some educational information, which identifying that section of the body appears along with an audio of what it is.
In addition to the interactive body sections is a whole index of reference pictures from the esteemed Gray's Anatomy text-book.
Once the body sections are learned well, there is a toggle to turn on a quiz mode. There is also a dedicated quiz section of the app with 23 multi-choice questions.
This app is an excellent free study guide and only slightly less functional than similar apps I have seen for around $80.00.
Compatible with iPhone, iPad, and iPod touch.