coelum
ur vagina
Hemocyanin is a copper-containing protein found in the circulatory system of many mollusks and arthropods. It functions in oxygen transport, similar to the iron-containing hemoglobin in vertebrates. Hemocyanin turns blue when oxygenated, giving these animals their characteristic blue blood.
Mollusks which have an open circulatory system, have blood that is pumped into sinuses containing tissue.
open!
Open
No, not all. Remember some arthropods are aquatic; the spiracle/trachea/tracheole system utilized by terrestrial insects is largely replaced by gills in marine arthropods.
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.
Chitin is found in the kingdoms Animalia (animals) and Fungi. In the animal kingdom, it is found in arthropods (crustaceans, insects, etc.), mollusks, and fish (scales of certain species of fish, such as carp). It is also found in the cell walls of fungi.
arthropods.
bilateral symmetry
Yes, chitin is a polysaccharide found in the exoskeletons of arthropods and cell walls of fungi. It is not a protein.