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System
Yes, the three main parts of the circulatory system -- heart, arteries, and veins -- work together. By definition, every organ system is made up of organs that work together.
system
It is called a system.
Body parts have to work together to do an activity because they are all one system. Without them working together, something may not function properly. This might be the lungs, or spine.
Different parts of the nervous system work toghether by performing one specific job which is to control and coordinate your body`s system.
The bone marrow, the lymph nodes, the spleen, and the thymus are the organs that are part of the immune system, all of which work together to produce the different types of white blood cells which keep you alive.
they protect certain body parts
Everything in the circulatory system works together to remove waste from the blood. The circulatory system provides the excretory system with the blood to be cleaned.
they protect certain body parts
The main parts of the circulatory system are the heart, arteries and veins. Together, they work together to pump blood throughout the system, with the blood within, containing oxygen that is vital to the survival of an organism.
Your central nervous system controls your entire body via the spinal cord.