Get to know the functions of your heart, blood vessels, and blood itself and how they work together to maintain your health.

Researchers from Cornell University and the University of Pennsylvania have created a lifelike robotic lionfish with a circulatory system, reports Gizmodo. That circulatory system enables the fish to ...

The heart and arterial (efferent) circulatory system in Argas radiatus and Ornithodoros turicata (Argasidae) and in Ixodes scapularis, Dermacentor variabilis and Amblyomma tuberculatum (Ixodidae) are ...