Polyferan is an aquatic animal, also known as a sponge. The sponge does not have a true circulation system, but a simple flow of water achieves the goal of exchanging nutrients and gas.
Is the circulatory system open in the sponge?
The simplest animals, such as sponges (Porifera) and rotifers (Rotifera), because diffusion allows for the proper exchange of water, nutrients, waste, and dissolved gas, as shown in Figure 1a. Does not require a circulatory system. .. .. Most arthropods and many mollusks have an open cardiovascular system.
Which animal has an open circulatory system?
Organisms with an open circulatory system usually exhibit relatively large amounts of blood lymph and hypotension. Examples of animals with an open circulatory system include insects, spiders, shrimp, and most mollusks.
Is the circulatory system open or closed?
Humans have closed the circulatory system. This means that blood is constantly trapped in blood vessels and the heart as it circulates throughout the body. Blood that passes through arteries and veins carries important molecules throughout the body and is constantly trapped.
Which gate has the circulatory system open or closed?
With the exception of cephalopods, members of the phylum Mollusk have an open circulatory system.
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