Other
Washington University: Hemoglobin and the Heme Group:
This site from the Department of Chemistry at the Washington University provides a deetailed study of the role of hemoglobin in blood physiology. The article is somewhat in-depth, complete with pictures, charts, and a bibliography.
Harvard University
Harvard University: Hemoglobin Synthesis
Information and images regarding hemoglobin synthesis from heme and globin are provided by Harvard University.
Other
Psbc: Introduction to Hematology
This well-illustrated overview of blood biology examines the development and function of each of the different types of blood cells. Features include an assessment test.
Science is Fun
University of Wisconsin Madison: Chlorophyll
This site on chlorophyll discusses what it is, its structure, molecules with similar structure, its role in photosynthesis, and its absorption spectrum.