Cephalopods are theonly molluscs with a closed circulatory system. Coleoids have two gill hearts (also known as branchial hearts) that move blood through the capillaries of the gills. ... Like most molluscs, cephalopods use hemocyanin, a copper-containing protein, rather than hemoglobin, to trans...
research on molluscs, particularly on gastropods, progressively decreased from 3.13% in 2012 to 0.46% in 2022. In contrast, the proportion of research conducted in cephalopods was stable between 1.3 and 2.3% (≈ 2%). From my perspective, cephalopods are one of the most fascinating ...
Related Articles Mesozoa are tiny, simple, worm or blob-like parasites that were once thought of as intermediates between protozoa (motile single-celled organisms) and metazoa (multicellular animals). However, now they are generally thought of as degenerate metazoa, that is, metazoans that descended...
Which kind of animals are trilobites and cephalopods? Do fish die of old age? Which feature distinguishes most fish from most amphibians? What is a freshwater aquatic ecosystem? Green algae is the oldest ancestor of what organism? What underwater animals are carnivores?
When most people hear the word "tentacle," the first animal they think of is probably a cephalopod. Cephalopods are a group of mollusks -- the same family as shellfish and snails -- that includes octopus, squid and cuttlefish. The family also includes the extinct belemite and ammonites. ...
univalve. (Science: zoology)A shell consisting of one valve only; a mollusk whose shell is composed of a single piece, as the snails and conchs. most univalves are spiral and are the shells of gastropods, but many belong to cephalopods and pteropods. ...
Cephalopods do have a small brain, but their nervous system is not like a central nervous system. The neurons are clustered all over the place, kind of in a network. Those clusters are called ganglia. And from there, they have some independent control of a segment of the body. There are...
) A genus of eight-armed cephalopods, including numerous species, some of them of large size. See Devilfish, Octoradiated (a.) Having eight rays. Octoroon (n.) The offspring of a quadroon and a white person; a mestee. Octospermous (a.) Containing eight seeds. Octostichous (a.) In ...
(paleontology) Any of an extinct group of cephalopods of the subclass Ammonoidea; a fossil shell of such an animal. Nautilus The only existing genus of tetrabranchiate cephalopods. About four species are found living in the tropical Pacific, but many other species are found fossil. The shell ...
Cephalopods: Yes, Squid and Octopus are both types of Mollusks. You may be thinking, “How can they be Shellfish? They don't have a shell!” Actually, they do. The difference is that, instead of growing a hard shell around them, they developed a tough plate inside called a “gladius...