I was looking for the answer to this too.
pancreas
The pancreas is involved in the digestive and the encrodine systems.
There are many functions that are performed by a number of organ systems such as circulation. These systems also control nutrient absorption for example.
8 or more of the 12 organ systems.
muscular system
respiratory system
integumentary, muscular, and skeletal systems
The integumentary (skin) system.
pipe organ
heart brain
The nervous and endocrine system.
Pretty much all the body systems are involved. Skeletal, muscles, circulation and breathing are all critical components. And digestion, while not directly involved, provides the energy required for the other systems.