Because it contains numerous organs (heart, lungs, veins etc).
The main organ of the circulatory system is the heart.
The heart is a major organ of the circulatory system responsible for pumping blood throughout the body.
This is known as an organ system. Examples include the respiratory system, circulatory system, and digestive system. Each system is made up of multiple organs that work together to carry out specific functions in the body.
The cardiovascular system pumps blood throughout the body.The Nervous System of course.
An organ system is a group of organs that work together to perform a specific function in the body. Examples include the digestive system, respiratory system, and circulatory system. Each organ system has a unique role in maintaining homeostasis and overall health.
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 cadiovascular system, sometimes called the circulatory system when it includes the lymphatic system.
circulatory system does.
the heart is the main circulatory organ of the frog
the circulatory system
Circulatory System
Circulatory
Circulatory.
The Cardiovascular system