The West is blinking in disbelief â Vladimir Putin just invaded Ukraine. German diplomats, French Eurocrats and American pundits are all stunned.
A: The main organ in the circulatory system is the heart, according to Hillendale Health. The two other major parts of the circulatory system are the blood and the blood vessels. The heart is found slightly to the left at the center of the chest, and it is primarily responsible for pumping blood and keeping the blood moving throughout the body, explains Hillendale Health.
What is the main function in the excretory system? The main function of the excretory system is to get rid of wastes  from the body. It is actually composed of many different structures  and organs in other systems of the boâ¦dy. The organs that contribute  are ones like the lungs, skin, liver, kidneys, colon, and bladder,  just to name a few.