September 29, 2008
Owls are part of the Avian group, so owls have the same circulatory system as other birds.
- It has a closed circulatory system.
- It has one heart.
- It has four chambers. (2 atria, 2 ventricles)
- Owls have larger hearts than mammals (relative to body size and mass), this is so because in flight there is a high metabolic demand.