: 11. Which body system contains veins, arteries, and blood? 12. Which body system is involved with the breakdown, digestion, and absorption of nutrients? 13. Which body system includes the pituitary and thyroid glands? 14. Receiving and processing information and controlling body structures to maintain homeostasis are roles of which body system? 15. Which body system is involved with heat production, support, protection, and movement? 16. Which body system provides immunity and maintains fluid balance? 17. Protection and temperature regulation are some roles of the nails are also structures in this system. system; hair and 18. Which body system is involved with producing children and hormones? 19. Delivering oxygen to cells and ridding the body of carbon dioxide are two major roles of which body system? 20. Which body system is involved with gathering information from vision, hearing, balance, smell, and taste? 21. Eliminating nitrogenous waste from the body and maintaining fluid and electrolytes are important roles for which body system? 22. Put the following in order from the simplest to the most complex organism, organs cells, body systems tissue