Mollusks gastropods bivalves and cephalopods
Headfooted Ex: octopuses, squids, cuttlefishes Working with a partner, decide which phylum each invertebrate belongs to that you listed earlier. Feel free to refer to online resources (e. g. , the textbook, Google, marinebio. org, etc. ) The Gastropods These are the most commonStart studying Mollusks: Gastropods, Bivalves, and Cephalopods. Learn vocabulary, terms, and more with flashcards, games, and other study tools. mollusks gastropods bivalves and cephalopods
Phylum Mollusca (Gastropods, Bivalves, Cephalopods) There are more than 50, 000 species in this phylum. Mollusks are invertebrates and include octopus,
The mollusks are a large group of arthropods that have a variety of outward appearances and include animals such as clams, octopuses, and snails. Because of their tremendous range of structures and styles, mollusks are divided into three groups: gastropods, bivalves, and cephalopods. Click a thumbnail to view more detailed pictures and information about each Gastropods, Bivalves and Cephalopods fossil. mollusks gastropods bivalves and cephalopods Cephalopod molluscs, such as squid, cuttlefish, and octopuses, are among the most neurologically advanced of all invertebratesand either the giant squid or the colossal squid is the largest known invertebrate species. The gastropods (snails and slugs) are by far the most numerous molluscs and account for 80 of the total classified species.
The mollusks that have a hinged, twopart shell joined by strong muscles are called bivalves. Clams, Oysters, and Scallops are bivalve mollusks and are a familiar food source. These three animals pull their shells closed by contracting powerful muscles near the hinge. The open these shells they have to mollusks gastropods bivalves and cephalopods Most mollusks have an open circulatory system but cephalopods (squids, octopus) have a closed circulatory system. The blood pigment of mollusks is hemocyanin, not hemoglobin. The heart of a clam can be seen in the photograph below. Bivalves have three pairs of ganglia but do not have a brain. Some mollusks have bilateral symmetry. Mollusks include gastropods such as snails, bivalves such as oysters, and cephalopods such as squid. Some bivalves have bilateral symmetry. Although gastropods and cephalopods both belong to the taxonomic phylum Mollusca more commonly known as mollusks that doesn't mean they're similar. With over 62, 000 described species, gastropods are much more common, and include snails and slugs of all kinds. Cephalopods Lists characteristics of mollusks and the three groups of mollusks, gastropods, cephalopods, and bivalves. Answer key shows which groups have which characteristics. Comparing Mollusks Chart KEY. Using what you know about the three major classes of mollusks, complete the chart below by checking the correct column or columns for eachRating: 4.59 / Views: 535