Travis drew the model shown to help describe how the body’s organs and organ systems meet the needs of all the body’s cells. The numbered parts of the model have not been labeled. Draw conclusions based on travis' model to determine what body system box #3 represents.

Student have 20 minutes to complete the aspire reading test

Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.