The human body contains several organ systems, each with a specific function. The diagram below shows one organ system of the human body. What is the function of this organ system? (SC.6.L.14.5)
A. to provide structure and support for the human body
B. to transmit messages between different parts of the body
C. to defend the body against organisms that cause diseases
D. to break down food into substances that the body's cells can use

Which fact from the tinker v. des moines court decision best supports the reasoning that the conduct of the student protesters was protected by the fourteenth amendment, which prohibits deprivation of life, liberty, or property? o a. the record shows that students in some of the schools wore buttons relating to national political campaigns, and some even wore the iron cross, traditionally a symbol of nazism. o b. on the other hand, the court has repeatedly emphasized the need for affirming the comprehensive authority of the states and of school officials, consistent with fundamental constitutional safeguards, to prescribe and control conduct in the schools. c. the action of the school authorities appears to have been based on an urgent wish to avoid the controversy which might result from the expression, even by the silent symbol of armbands, of opposition to this nation's part in the conflagration in vietnam. d. that they are educating the young for citizenship is reason for scrupulous protection of constitutional freedoms of the individual. if we are not to strangle the free mind at its source and teach youth to discount important principles of our government as mere platitudes.