Yes they do. The have 3 hearts.
worms mollusks
Venous hearts are found in certain invertebrates, particularly in some mollusks and arthropods. These hearts pump blood from the body cavity into the gills or other respiratory structures.
I only have three but here they are! 1.there are about 100000 species of mollusks. 2. An octopus has 3 hearts. 3. an oysters shell is made of calcium.
Mollusks, shrimp,and crustacens=) Mollusks, shrimp,and crustacens=) Mollusks, shrimp,and crustacens=) Mollusks, shrimp,and crustacens=)
Mollusks, shrimp,and crustacens=) Mollusks, shrimp,and crustacens=) Mollusks, shrimp,and crustacens=) Mollusks, shrimp,and crustacens=)
Mollusks are invertebrates because they do not have a backbone.
Raccoons eat mollusks. Otters eat mollusks. People eat mollusks.
Cephalopods are the only mollusks with a closed circulatory system. They have two gill hearts (also known as branchial hearts) that move blood through the capillaries of the gills. A single systemic heart then pumps the oxygenated blood through the rest of the body. Like most molluscs, cephalopods use hemocyanin, rather than hemoglobin to transport oxygen
Mollusks are not classified as mammals.
oysters
The only mollusks that are Gastropoda are slugs and snails.
A scientist who studies mollusks is called a teuthologist.