is a rats heart bigger than a humans compared to the rats body size?

Question: is a rats heart bigger than a humans compared to the rats body size?
- Keywords:
  heart,
  human body,
  organ,
  proportion,
  rat
Asked by anniew to Jo on 14 Jun 2012.
- Joanna Cruden answered on 14 Jun 2012:
  
  Surprisingly they are about the same!. A human heart is about 300g in males and 200g in females. Taking an adult male weighing 65kg the heart is 0.46% of the body weight. A rat heart is about 2g and for a 400g rat that is 0.5% of body weight!

Question: is a rats heart bigger than a humans compared to the rats body size?