heart
Blood vessels
Capillaries
Circulatory system
Veins
Blood
Arteries
The blood vessels in which the exchange happens
Carry blood from the heart to the organs, transporting nutrients and oxygen.
Carry blood from the organs to the heart
This is the system that allows blood and other vital substances to flow throughout our body.
tubes that circulate the blood.
Red liquid that fills the circulatory system. It collects, transports and releases oxygen, nutrients and waste.
hollow organ with four cavities surrounded by muscular walls.