How crustacean heart differs from human's?

1. Open and closed circulatory system

2. Myogenic (human) and neurogenic (crustacean) heartbeat

Neurogenic vs. Myogenic

Myogenic heart:

   The cardiac muscle possesses automaticity and contract spontaneously. A myogenic heart is capable of generating a cardiac contraction independent of nervous input.		 Neurogenic heart:
   A neurogenic heart requires nervous input to contract.
   Crustacean cardiac ganglion is a cluster of neurons on the heart wall and produces rhythmic motor output for the heartbeat.