References

Closed Circulatory System: Definition, Advantage & Quiz -

Video & Lesson Transcript | Study.com. (n.d.). Retrieved from http://study.com/academy/lesson/closed-circulatory-system-definition-advantage-quiz.html

Common Earthworm (Lumbricus terrestris). (n.d.). Retrieved

from http://www.robinsonlibrary.com/science/zoology/annelids/earthworm.htm

Genus Romalea - Lubber Grasshoppers - BugGuide.Net. (n.d.).

Retrieved from http://bugguide.net/node/view/2806

Lumbricus terrestris (lob worm) | Natural History Museum.

(n.d.). Retrieved from http://www.nhm.ac.uk/nature-online/species-of-the-day/collections/collecting/lumbricus-terrestris/

Species Romalea microptera - Eastern Lubber Grasshopper -

BugGuide.Net. (n.d.). Retrieved from http://bugguide.net/node/view/2807