____________ are distributed throughout the body, making up the monocyte-macrophage system or reticuloendothelial system.

Answer 1

Since this is not my area of expertise, I searched Google under the key words "reticuloendothelial" to get these possible sources:

http://en.wikipedia.org/wiki/Reticuloendothelial_system
http://www.thefreedictionary.com/reticuloendothelial+system
http://www.britannica.com/EBchecked/topic/499989/reticuloendothelial-system
http://www.answers.com/topic/reticuloendothelial-system

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.

I hope this helps. Thanks for asking.