Narrated three-dimensional computer animation explaining the complex structure of the human skull. (Length: 2 min. 51 sec.)

A two-part tutorial illustrating the structure and growth of bones, followed by a description of the cartilage model. [8:27]

This video explains how the endocrine system plays an important role in calcium homeostasis through its effect on bone remodeling and its effect on calcium absorption. [8:22]