long system
nervous system
nervous system
The heart belongs to the Circulatory System or the Cardiovascular System.
the liver belongs to the digestive system.
The cooling system.
the liver belongs to the digestive system.
The electrical system.
The heart belongs to the Circulatory System. :) have fun :)
The brain belongs to the Nervous system. It is the only major organ in that system.nervous system
the kidney belongs to the osmo-regulation and the excreatory system.
hexagonal crystal system ( 6 sided )
the integumentary system!