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Above is a diagram of an open circulatory system. An open circulatory system is made up of a heart, vessels, and hemolymph. This diagram shows how the hemolymph, fluid present in most invertebrates that is equivalent to blood, is circulated throughout the body of a grasshopper.
Confidence votes 128. There's a hierarchy to this; in the largest form, the heart is made from muscle tissue; muscle tissue is made from cells, and cells are composed of elements. The heart is hollow and shaped like a cone.It is made of specialized muscle tissue which allows it to beat your entire lifetime.he heart is comprised of the left and right atria and the left and right ventricles. The atria pump blood to the lungs, where it is oxygenated. The oxygenated blood then retu â¦ rns to the heart, where the ventricles pump it to the rest of the body.