Levels of Organization
Smallest unit
Cell
Receives blood from lungs and pumps it to your body
Left side
Two at the top
Atria
First stop
Right Atrium
1st level
Cell
A group of organs
Organ System
Receives blood from your body and pumps it to your lungs
Right side
Two at the bottom
Ventricles
2nd stop
Right Ventricle
Tissue
A living thing
Organism
Takes blood to the heart
Vein
Carry blood away from the heart
Arteries
Quick trip where
Lungs
3rd level
Organ
A group of tissues
Organ
Moves blood away from the heart
Artery
Carry blood to the heart
Veins
3rd stop
Left Atrium
4th level
System
A group of cells
Tissue
Largest organ part of the circulatory system
Heart
Connect arteries and veins
Capillaries
Last stop
Left ventricle
5th level
Organism