Bug fixes and performance enhancements

**More than 100 new microscope images showing body tissues! **Zoom and pan all images in full screen mode! A single tap enters full screen mode and double tapping or pinching zooms in and out. **And as always, bug fixes, enhancements, and minor improvements.

* Over a dozen enhanced animations that explain physiology topics! See how condyloid joint movement allows for circumduction, flexion, and extension; visualize how neurons transfer messages throughout the body, and understand the multi-step process of fertilization to implantation with 3D animations created by our in-house team. * Now available in Spanish! Spanish joins five other languages that can be set within the app. * All-new quiz experience! More quizzes added for cell structure and function, smooth and cardiac muscle tissue, and reproduction/fetal development; and a brand new UI that empowers students to test their knowledge with multiple choice and dissection quizzing.

- NEW! Customize the app and track your learning. Create a library of Favorites with 3D models, illustrations, animations, and notes that you need to review. Access a question-by-question assessment of quiz performance to track your understanding of the concepts. - ALL-NEW USER EXPERIENCE! We’ve made it even easier for you to pick a lesson and move through it at your own pace. Prefer to jump around to specific topics? The new search tool makes it fast to find topics covered at various points throughout the course. - Other enhancements: All new look and feel, plus ability to zoom into images and share content with others.

-More in-depth coverage of pregnancy and fetal development: Implantation, blastocyst development, neurulation, multiples, and pregnancy hormones. - Stability enhancements

*****Expanded coverage of cell life cycle (transcription and translation) and muscle actions (role of ATP and ADP). *****New 3D models added of bones that show major landmarks.

Minor bug fixes.