Multiple choice

The brain and spinal cord  work together to do a specific job. This is an example of?

  1. cell

  2. tissue

  3. organ

  4. organ system

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The brain and spinal cord are individual organs that work together to form the central nervous system. A group of organs working together to perform a major body function is classified as an organ system.