The two ways the endocrine system and the nervous system are different in communication, is that the nervous system responds rapidly to short-term changes in the body by sending electrical impulses. And with the endocrine system, it takes longer, so it's a long-term effect until it notices any changes and when it does, it sends chemical messengers known as hormones into the body.
Now, how they are similar, is because both the nervous and endocrine systems work together to maintain homeostasis.
The endocrine system(E.S) is made up of network of glands-the endocrine gland and organs that produce endocrine secretions or chemicals (hormones) directly into the blood streams. The pituitary glands, adrenal glands are examples.
The nervous system (N.S) is composed of bundles of nerve fibers and organs (the brain and spinal cord) to form the CNS and PNS for coordination of body activities. It makes use electrical signals for communication.
Both systems are similar because the coordinate the body activities to a relatively stable state with the surrounding environment. This is homeostasis. This connecting link is mediated by the hypothalamus.
Differences.
Mode of transmission;
Fast Electrical signals, as action potential, is the transfer signals in NS.
Relatively fast Chemical signals as hormones are the transfer signals in E.S. Thus nervous transmission is faster than endocrine for this reason, and this also explain why N.S signals are short lived ,and why E.S lasts longer.
Communicated channel
Transmission is through the axon of neurons in NS, while blood stream is the medium of transmission in E.S. This explains why the integrity of nervous signals are maintained compare the E.S
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