Both include some internal organs, and both involve coordinated communication between various parts of the body. Parts of the endocrine system are closely connected to a part of the nervous system - i.e. pineal gland, pituitary gland are closely connected to the brain. read more
Are similar because they both release chemicals and share many chemical messengers. Nervous System Releases neurotransmitters at a synapse, very close to its target, and the action is fast and short. read more