Eastern Kentucky University
Eku: Comparative Vertebrate Anatomy Skeletal System
Lecture notes and diagrams about the skeletal system. Also includes a link to more lecture notes.
Biology 4 kids
Biology4 Kids: Quiz: Skeletal Systems
Take this ten-question review quiz over the skeletal systems of animals. Read more about each question after an incorrect answer is given.
University of Guelph
University of Guelph: Structure of the Skeleton
A small amount of comparative anatomy specifically focused on the anatomy of animals used for meat.
BiologyWise
Biology Wise: Information About the Hydrostatic Skeleton
Explains what a hydrostatic skeleton is and the types of organisms that have one. Describes examples from six phyla and the advantages and disadvantages of this type of skeleton.