GCSE Biology (AQA)

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Heart Anatomy

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Organisation Animal Tissues, Organs and Organ Systems

Heart Anatomy

3:39 Circulatory and Respiratory System
Spec 4.2.2.2
Previous Blood Vessels Next Heart Circulation
  • The heart is an organ within the circulatory system.
  • The circulatory system consists of the heart, blood vessels, and lungs, where gas exchange occurs.
  • The heart is primarily composed of muscle and nervous tissue, enabling it to pump blood throughout the body.
  • Cardiac muscle cells, which make up the heart, are specialized cells.
  • The coronary arteries supply blood to the heart muscle.
  • The heart has four chambers: right atrium, left atrium, right ventricle, and left ventricle.
  • The heart's structure is mirrored in diagrams to resemble its position in our body; the left side is more muscular.
  • Four main blood vessels are connected to the heart: the vena cava, pulmonary artery, pulmonary vein, and the aorta.
  • The heart contains four valves to prevent the backflow of blood, separating the atria from the ventricles and the ventricles from the arteries.
  • Understanding the structure and function of the heart, including its chambers, blood vessels, and valves, is essential for exams, though naming specific valves is not required.

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