Organs working together to perform a specific bodily function cytoplasm 2. to draw together contract 3. a structure that performs a specific function within a cell cell 4. the genetic "blueprint" that determines the cell's purpose and function nucleus 5. the organelle within a cell that functions as its brain, regulating its production of protein tissue 6. a group of cells that have the same purpose system 7. the basic structural unit of the body dna 8. a group of tissues that works together to perform a specified bodily function organ 9. the fluid-like substance contained within the cell membrane organell