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A-Level Biology OCR A

Valves Backflow Blood Chordae Tendinae Prevents Ventricle Atrium

Front Describe the function of each of the valves and chordae tendinae
Back Valves and chorade tendinae:
  • Tricuspid valve prevents backflow of blood from right ventricle to right atrium
  • Bicuspid valve prevents backflow of blood from left ventricle to left atrium
  • Semilunar valves prevent backflow of blood into the heart from pulmonary artery and aorta
  • Chordae tendinae - make sure valves are not turned inside out by pressures exerted

(aortic and pulmonary valves are semilunar)

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