The ignorance drives me nutz! At the first time that a rhythmic contraction can be detected, there is no heart, there is no circulatory system, there is only a piece of unformed contractile tissue, and to call that a heart beat is completely disingenuously incorrect.
The ignorance drives me nutz! At the first time that a rhythmic contraction can be detected, there is no heart, there is no circulatory system, there is only a piece of unformed contractile tissue, and to call that a heart beat is completely disingenuously incorrect.