Which volume corresponds to the typical total blood volume in an adult mouse?

• A. 0.2 ml
• B. 0.5 ml
• C. 1.2 ml
• D. 5.0 ml

Answer: (C)

Total blood volume in a mouse scales with body weight, and for small mammals it’s about 6–8% of body mass. An adult mouse (~25 g) typically holds roughly 1 to 2 milliliters of blood. The value around 1.2 milliliters fits that common range, making it the best estimate for a typical adult mouse. A much smaller figure, like 0.2 or 0.5 milliliters, would imply a far smaller or unrealistically low volume for a healthy adult mouse, while a figure as large as 5.0 milliliters would exceed what a mouse can safely contain. So 1.2 milliliters is the closest and most representative total blood volume for an adult mouse.