four chambers
4
Two
Dolphins have a four-chambered heart.
A fish's heart have Two chambers .
The fox has a 4 chambered heart.
There is no such thing as a fiber chamber of the heart.
1
bird:3 human:4
A spider monkey has four chamber like the human heart
In normal sinus rhythm the heart rate is below
Heart Chamber Phantoms was created on 2010-01-26.
The heart of a lamprey looks similar to that of modern fish in a sense. It is a two chambered heart with a single atrium and a single ventricle. The atrium of the heart is proceeded by a sinus venosus, which isn't considered an actual chamber but rather pre-heart chamber. Then after the ventricle we have a conus arteriosus that again isn't considered to be a chamber of the heart but rather a post-heart chamber. The blood flow through the heart is a one way path like that of modern day fishes.