Which of the following is an example of an organ system?

The choice indicating that all provided options represent an organ system is accurate because each example refers to a distinct organ system within the human body, and all of them play crucial roles in maintaining bodily functions.

The cardiovascular system encompasses the heart and blood vessels, facilitating the circulation of blood and delivering oxygen and nutrients to tissues while removing waste products. The skeletal system, consisting of bones, cartilage, and ligaments, supports the body structure, protects vital organs, and facilitates movement in conjunction with the muscular system. The neurologic system, which includes the brain, spinal cord, and nerves, is responsible for controlling and coordinating bodily functions, processing sensory information, and enabling responsive actions.

Since each of these systems is integral to the overall functioning of the human body, acknowledging that all options represent valid organ systems demonstrates a comprehensive understanding of human anatomy. This reinforces the interconnectedness of the body's systems and highlights the importance of each in maintaining health and homeostasis.