Arthropods and mollusks have an open circulatory system, where blood (hemolymph) is not confined exclusively to vessels but bathes the organs directly in a hemocoel. In arthropods, such as insects and crustaceans, a dorsal heart pumps hemolymph through vessels into the body cavity, while in mollusks, the heart pumps hemolymph through a series of sinuses. This system allows for efficient nutrient and gas exchange despite the lack of a closed network. However, some cephalopod mollusks, like octopuses, possess a closed circulatory system for more efficient oxygen transport.
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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.
Not all animals with antennae are arthropods, although antennae are a characteristic feature of this group. Antennae are sensory structures found in various animal phyla, including some mollusks and certain annelids. However, the presence of antennae is most commonly associated with arthropods, such as insects, crustaceans, and arachnids. Thus, while many animals with antennae are indeed arthropods, they are not exclusively so.
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.
Yes, chitin is a polysaccharide found in the exoskeletons of arthropods and cell walls of fungi. It is not a protein.