What is copulation?

Copulation is sexual intercourse; coitus.
c. biloculare A more or less two-chambered heart due to the absence or incomplete development of the interatrial and interventricular septa.
c. pulmonale Enlargement of the right ventricle of the heart, secondary to a disease of the lungs.
c. triloculare A three-chambered heart due to absence of either the interatrial or the interventricular septum.

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