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.
Figure 26-1 shows the major organs of the digestive system. Table 26-1 summarizes the structures making up the digestive system. The main function of the overall digestive system (Box 26-1) is to break down food into simpler forms that the circulatory vessels can carry and pass through the cell membranes to the cells. The cells then use these food molecules or nutrients for energy and to build, maintain, and repair body tissues.