Anterior end of Hipponoa gaudichaudi (Amphinomidae: Polychaeta)(5.4MB, 00:00:18)Shot Location: Seto Marine Biological Laboratory, Kyoto University | ||
| species Hipponoa gaudichaudi Key Words | ||
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Animalia >Annelida >Polychaeta >Amphinomida >Amphinomidae >Hipponoa >
Annelid worms have a closed circulatory system. Many have hemoglobin as their respiratory pigment. Their blood is red as in vertebrates and blood circulation is easily observed. There are two main blood vessels in Annelid worms: dorsal and ventral blood vessels. In the dorsal vessel, the blood flows from tail to head whereas in the ventral vessel the blood flows in the opposite direction. This video shows the pulsebeat of the dorsal vessel.
(Data No.momo050215hg01b)
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