Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
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Adult cow heart. Attribution-NonCommercial 4.0 International (CC BY-NC 4.0). Source: Wellcome Collection.
Adult cow (bovine) heart, viewed from the left side if it were in the body. The heart consists of four chambers through which blood flows; two upper chambers (atria; blood enters the heart through these) and two lower chambers (ventricles; blood exits the heart through these). Windows have been cut in the right ventricle (lower left of image) up to the pulmonary artery, in the left ventricle (lower right of image) and in the left atrium (auricle; upper right of image) to expose the inside of the heart chambers. There is a black rod in the left azygous vein (top right of image). The heart measures 27 cm from base to apex. Photograph 2013.