Neither. The spleen is part of the immune system
Because it does no function in the digestive system. The spleen functions with the circulatory and immune systems. It removes old red blood cells and synthesizes antibodies.
Circulatory.
The spleen is part of the lymphatic system.
Heart,spleen
The Lymphatic System.
the digestive system and the respiratory system, or the lymphatic system and the endocrine system, or the digestive system and the cardiovascular system, or the endocrine system and the cardiovascular system
The spleen produces blood cells, and forms part of the immune system.
The relation between the circulatory system and the digestive system is that the digestive system makes energy so the energy goes to the heart and that is what makes it pump.
The circulatory system works with digestive system to circulate the nutrients to all the body parts. The nutrients are digested and absorbed by the digestive system. The circulatory system circulates the nutrients throughout the body.
The digestive system breaks down nutrients and allows them to be absorbed the the circulatory system, which carries them to all body cells. The circulatory system carries needed materials to the cells of the digestive system, so that they can carry out body processes.
The circulatory system picks up nutrients from the digestive system and takes them to the cells. Absorption is the process of moving the nutrients from the digestive system to the circulatory system.
The circulatory system picks up nutrients from the digestive system and takes them to the cells. Absorption is the process of moving the nutrients from the digestive system to the circulatory system.