GCSE Biology Paper 1 (9-1 Exams)
Blood Atria Flows Pulmonary Contract Ventricles State Pathway
Front |
State the pathway of blood flow through the heart. |
Back |
- Blood flows into the two atria from the vena cava and the pulmonary vein
- The atria contract, pushing the blood into the ventricles
- The ventricles contract, forcing the blood into the pulmonary artery and the aorta, and out of the heart
- The blood then flows to the organs through arteries, and returns through veins
- The atria fill again and the whole cycle starts over
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GCSE Biology Paper 1 (9-1 Exams)