What is the difference between the circulatory system of annelids and the circulatory system of molluscs?
| September 14, 2021 | education
The circulatory system of molluscs is not closed. The blood mixes with the internal environment of the body cavities. The color of the blood is slightly bluish due to the presence of a large amount of copper in it. The heart, depending on the type, is two-chambered or three-chambered.
In annelids, the circulatory system is closed, the blood is red and the role of the heart is played by 5 pulsating vessels.
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