Which one of the following has an open circulatory system?

Step-by-step solution

The Periplaneta has an open circulatory system, which means that blood does not flow through blood vessels and instead flows through haemocoel (body cavity). All vertebrates and annelids (such as earthworms) and cephalopods (squids and octopus), have closed circulatory system. Related Theory In all vertebrate organisms, as well as some invertebrates, this is a closed-loop system in which the blood is not moving freely in a cavity. In a closed circulatory system, blood is contained inside blood vessels, circulating