BiologyWise
Biology Wise: Anatomy of a Rat
Describes anatomical features of a rat that can be seen during a dissection, including external anatomy, glands in the neck region, organs in the abdominal cavity, and the urogenital system.
University of Manitoba
University of Manitoba: Respiratory System
This site from the University of Manitoba provides an explanation of the purpose and structure of the respiratory and circulatory systems. Follow the link to the images.