Hematology is the study of blood. Why are dogs used in hematology studies according to the material?

• A. Because they have inherited blood defects similar to humans
• B. Because they have no blood
• C. Because they are cheaper than mice
• D. Because they are not subject to ethics

Answer: (A)

The reason dogs are used in hematology studies is that they have inherited blood defects that resemble human conditions. This means dogs naturally develop hematologic diseases with genetic and physiological features similar to those in people, providing a realistic model to study disease mechanisms, progression, and how therapies might work in humans. For example, canine von Willebrand disease and other inherited clotting disorders offer a way to observe hemostasis in a living system with comparable blood chemistry and pathways, which helps in evaluating diagnostics, treatments, and potential gene or drug therapies. Their physiology and size also allow procedures and sampling approaches that can be more representative of human clinical scenarios than smaller animals. The other options don’t fit because dogs do have blood, ethics and regulatory oversight govern animal research, and cost considerations are not the main reason highlighted in the material.