Answer:
Respiratory system breathing:
Digestive system /excretory system
Circulatory system
Urinary system
Integumentary system
Skeletal system
Muscular system
Endocrine system
Lymphatic system
Nervous system
Reproductive system
There are other systems in the body that are not organ systems. For example, the Immune system protects the organism from infection, but it is not an organ system as it is not composed of organs.
Some organs are in more than one system. For example, the nose is in both the respiratory system and also is a sensory organ in the nervous system. The testes and ovary are both part of the reproductive systems and endocrine systems.
