the heart is part of the circulatory system in the body.
The Heart is the main organ of a circulatory system.
The main organ of the circulatory system is the heart.
The heart is the main organ of the circulatory system.
the heart is the main circulatory organ of the frog
The heart.
The main function of your circulatory system is to oxygenate blood and pump it throughout your body
It is the heart.the heart
It is the heart.the heart
The main organ of the circulatory system is the heart, and it pumps blood to the cells of organs and tissues, giving them oxegyn and removing carbon dioxide.
It is main organ of the system.
An artery is a part of the circulatory system, the main organ could be considered the heart