The heart and the lungs, otherwise known as the cardiovascular system.
Circulation is the pumping of blood and oxygen throughout your body. Your heart is the main organ in this process. Without the circulation system, you could not function.
The Heart
The pumping organ of the circulatory system is the heart. It generates the pressure to move blood through the circulation.
It is the systematic circulation system or if you want a specific organ the aorta.
It is the systematic circulation system or if you want a specific organ the aorta.
Cardiovascular and neurological
"Baby systems" may refer to the various systems within a baby's body that are responsible for functions like digestion, respiration, circulation, and nervous system activity. These systems are essential for a baby's growth, development, and overall health.
circulation of the blood occurs in mammals b/c of the heart. it pumps the blood through out the body, which is circulation. the heart is an organ of the circulatory system
digestion
The small intestine is responsible for the absorption of nutrients.
Digestive system
The major organ in the muscular system responsible for generating movement and providing support to the body is the skeletal muscles.