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Liquid part of blood


Blood cells that carry oxygen from lungs to the body, contain 30 mil. Hemoglobin


Blood cells that fight infections


Cause blood to clot to prevent blood loss


Molecule that carries oxygen using iron to bind it


Number of heart chambers in human

Right atrium

Gathers blood from the body, poor in oxygen, pumps into right ventricle

Left atrium

Strongest chamber in heart with thick muscular walls, pumps blood to the body & left ventricle


Carry high pressure blood awa ly from the heart


Carry blood towards the heart, contain valves to preven backup


Not bigger than the cells to keep high pressure, connect arteries to veins

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