Heart
the heart is part of the circulatory system in the body.
The Heart is the main organ of a circulatory system.
The circulatory system and the cardiovascular system. :D NOT jk
The heart is the main organ of the circulatory system.
The major organ of the circulatory system is the heart. The three parts that are involved with the circulatory system are the blood, the heart, and the vessels.
Which organ system IN human is most directly involved in the transport of oxygen?(1)digestion (2)nervous(3)excretory(4)circulatory
The cadiovascular system, sometimes called the circulatory system when it includes the lymphatic system.
the heart is the main circulatory organ of the frog
circulatory system does.
the circulatory system
Circulatory System
The respiratory system and the circulatory system