Working With The Laboratory Mouse AALAS Practice Test

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

0.2 ml 0.5 ml 1.2 ml 5.0 ml

Correct Answer:

1.2 ml

Explanation:

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.

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