Ok, I have no idea what you mean by that question. Technically, since blood flows to the spleen to keep it alive...then yes. But blood flows to every living cell in your body to keep it alive so...yeah. But is the spleen a part of the circulatory system? That is also a yes. It is part of the lymphatic system, not the cardiovascular system. The lymphatic system is a sub-system of the circulatory system that basically helps fight infection, recycle blood plasma, etc. Most people do not think of the lymphatic system as part of the circulatory system though (even though it is) and most use the words "circulatory" and "cardiovascular" interchangeably (even though they're not interchangeable). Seeing as the cardiovascular organs are the heart and blood vessels, if that is what you meant...then no it's not. Please be more specific with your questions.
Circulatory.
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.
Lymphatic System
The spleen belongs to the Lymphatic/Immune System.
no
Neither. The spleen is part of the immune system
Circulatory.
Heart,spleen
The Lymphatic System.
The spleen produces blood cells, and forms part of the immune system.
The circulatory system, including the heart, spleen, liver, and all the veins and arteries.
Muscle and the spleen and the heart and the lungs and the mouth
All organs are fed by the circulatory system. Examples include the skin, stomach, uterus, brain, kidneys, and spleen.
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.
The blood is part of the Circulatory System, which includes the heart, lungs, arteries, veins, kidneys, liver and spleen. Here is a good photo, (but leaves out the spleen): http://www.daviddarling.info/images/circulatory_system.jpg
The spleen produces lymphocytes. As blood flows through the spleen, lymphocytes attack or mark pathogens in the blood. If pathogens cause an infection, the spleen may also release lymphocytes into the bloodstream.
Lymphatic System