The imune system protects you and your organs from catching any type of bacteria or virus. How protective it is depends on the health of the person and what they eat.
The job of the respiration system is to take in oxygen and get rid of carbon dioxide
2 of the jobs are: for support, and for protection of the brain and organs
The cardiovascular system provides cells with oxygen, nutrients and can also regulate body temperature, to name a few.
The job of the skin system is to protect the inside of your body from the outside world. It is your first layer of defense to fight off germs