Page 32 - 11-Bio-14 Transport

14. Transport eLearn.Punjab

9. The dorsal vessel collects blood from the 14th 9. The flow of blood from heart to, aorta to,
segment backwards. In the first 13 segments haemocoel in head, to perivisceral sinus,
it becomes distributing channel and sends its to perineural sinus, to pervisceral sinus, to
blood to hearts and anterior end of the body. pericardial sinus, and to heart through ostia.
Ventral vessel is the chief distributing vessel with
backward flow.The subneural vessel is collecting
vessel and the flow of blood is backwards. It
communicates with dorsal blood vessel through
commissural vessels.

Fig. 14.15 Closed circulatory system of earthworm

Animation 14.8: Closed circulatory system of earthworm V: 1.1
Source and Credit: waterwereld

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