A synapse is some type of structure located on a neuron, that makes the exange of information between neurons possible.
The two main part of the structure are the neurotransmitter transporter and the receptors, which send and recieve information respectively and are found in every nervous cell.
I have pasted an image below, so you can see how a synapse looks.
Hope it helped,
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I believe that the answer you're looking for is Water.
Answer:
What system interacts to perform the functions of regulation?
Body systems interact to perform the functions of regulation, nutrient absorption, reproduction, and defense from injury or illness
A detritivore, also known as a detrivore, are heterotrophs or decomposers that act as nature's recyclers and feed on dead organic material/remains