Technically, the three parts are:
1. Your heart
2. Your veins
3. Your arteries
The circulatory system carries blood around your body, providing oxygen to you muscles. This is why your heart beats faster when you run.
The Heart, The Veins and Arteries and The Lungs
Actually, there are only 3 parts to the circulatory system, and they are the heart, blood vessels, and the blood.
heart blood blood bessels
There is only one major organ in circulatory system that is heart. Brain and lungs are not its parts they are parts of nervous and resperatory system. you may also see blood vessels as a part of circulatory system but its not an organ.
THE ANSWER IS THE HEARTand the veins and the googleGeeves would like to suggest that there are three essential aspects to the circulatory system: Heart, lungs, and brain. Without any one of these organs the circulatory system would cease to function.
The human body has 3 main parts:The heartThe bloodThe blood vesselsSometimes people count the fluid lymph, and the vessels that carry it in them, parts of the circulatory system.A few of the parts of the heart are ventricles, arteries, valves, the septum, and the atria. The pumping sound of the heart comes from valves opening and closing.
1.arteries 2.vien 3.capillaries
The heart <3
The body systems connected to the circulatory system are 1. Respiratory system 2. Digestive system 3. Muscular system
Well technically all of it. If you didn't have one part to it you would be dead. But their are 3 main parts to it, the heart, veins, and capillaries.
the circulatory system has 3 names and all of which involve the suffix "gina". the three are mangina, vagina, and footgina
their circulatory system is tottaly different from each other as fishes have sinple circulatory system and consists of single auricle and ventricle while all amphibians have double circulatory system and have 3 chambers of heart (one ventricle and two atrium).