American Society of Hematology. Blood Basics Descriptions of the four main components of blood and the function of each within the body Blood Disorders Information on common blood disorders such as anemia, bleeding disorders including hemophilia, blood clots, and blood cancers. Think Anatomy. The Dr. Oz Show. Mayo Clinic. WebMD. MedBroadcast Forum. UofBuffalo Case Studies. HHMI BioInteractive.