Rats are generally larger, with robust bodies and long tails, while mice are smaller and have more slender bodies and shorter tails. Behaviorally, rats are known for their cautious nature and ...

Techniques for blood collection from the rat include puncture of the heart, retro-orbital plexus, jugular vein, saphenous vein, tail blood vessels, carotid artery, abdominal aorta, and vena cava.