The hip Joint model has 7 parts. Model is of adult male hip joint with the individual muscles and color-coded muscle origins and insertions on the femur and the hip bone. The hip muscles are removable. Now included with all 3B Scientific Anatomy models is the 3B Smart Anatomy app. This app allows users to register their 3B item to extend the warranty from 3 to 5 years plus free 1 year access to the 3B Smart Anatomy app which includes 23 Anatomy lectures, 117 interactive models and 39 quizzes.