The West is blinking in disbelief â Vladimir Putin just invaded Ukraine. German diplomats, French Eurocrats and American pundits are all stunned.
The  circulatory system is the body's transport system. It is made up of a group of organs that transport blood throughout the body. The heart pumps the blood and the arteries and veins transport it. Oxygen-rich blood leaves the left side of the heart and enters the biggest artery, called the aorta.
The Main Organs. The main organs of the nervous system are, the brain, the spinal cord and the nerves. Here is what each organs do and a picture. The brain functions to keep your memory. The brain is connected to most everything in your body. Information is sent from all body systems to the brain.