Level 16
Level 17

The Circulatory System


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Heart
An organ that pumps blood around the body.
Right Atrium
This receives deoxygenated bloodfrom the body from the Vena Cava.
Vena Cava
The vein that brings deoxygenated blood into the heart from the body.
Right Ventricle
This pumps the deoxygenated blood to the lungs, to become oxygenated, via the Pulmonary Artery.
Pulmonary Artery
Carries deoxgenated blood to the lungs to become oxygenated.
Left Atrium
Receives blood from the lungs via the pulmonary vein.
Pulmonary Vein
Bring oxygenated blood back into the heart from the lungs.
Left ventricle
Pumps blood to the rest of the body via the aorta.
Aorta
Carries blood the the rest of the body.
Valves
These prevent the backflow of blood.
Septum
The wall of tissue that separates the left and right sides of the heart.
Red Blood Cells
These carry oxygen stuck to their surface with haemoglobin. They are biconcave.
White Blood Cells
These defend the body against diseases.
Platelets
These help blood clot. They are small fragment of cells.
Plasma
The liquid that carries everything in the blood.
Arteries
Carry blood away from the heart at a high pressure
Capillaries
Small blood vessels, only one cell thick.
Veins
Carries deoxygenated blood to the heart at a low pressure, have valves to prevent backflow.