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Very thin blood vessels that run to the organs to exchange substances between the blood and the cells.
Capillaries
Carries the blood from the organs to the heart.
Veins
Carries the blood from the heart to the organs.
Arteries
Two chambers in the upper part of the heart.
Atriums
Two chambers located in the lower part of the heart.
Ventricles
Part of the heart between the atriums and ventricles that opens to let blood flow through in one direction but keeps it from flowing back.
Valves
The circuit where blood travels between the heart and the lungs.
Pulmonary
The circuit where blood travels between the heart and the other organs.
Systemic
Blood moves through these two circuits.
pulmonary circuit and systemic circuit
Oxygen, nutrients and ______ travel in the blood from one part to another.
Waste
____________ is the releasing of waste produced by our cells outside the body.
Excretion
____________ is released through the respiratory system.
Carbon dioxide
Contain thousands of tiny tubes that remove waste from the blood to make urine.
Kidneys
Part of the excretory system made up of ureters, the bladder and the urethra.
Urinary tract
The _______ containing waste products enters one of the two kidneys.
blood
The kidneys _______ the blood to clean it.
filter
