What are the characteristics of the class Cephalopoda?

What are the characteristics of the class Cephalopoda?

Cephalopoda means “head foot” and this group has the most complex brain of any invertebrate. Cephalopods are characterized by a completely merged head and foot, with a ring of arms and/or tentacles surrounding the head. The arms, tentacles, and funnel are all derivatives of the foot.

What are 2 or 3 characteristics that separate cephalopods from other mollusks?

The cephalopods appear to be very different from other mollusks, but physiologically they are similar. Cephalopods, like most mollusks, have a mantle, a mantle cavity, a radula, and a U-shaped digestive tract. Cephalopods have two kidneys and three hearts, which pump blue blood.

What are the 3 types of cephalopods?

Three main clades are typically identified within the Cephalopoda (cladogram B, left): the Ammonoidea (an extinct and shelled clade), Nautiloidea (with only one living shelled genus, Nautilus) and Coleoidea (squids, cuttlefish, octopuses, the Ram’s Horn Squid, the “paper nautilus,” and an extinct clade, the belemnites) …

Which of the following are included in the class Cephalopoda?

Clams, Snails, and Squid: Phylum Mollusca, Class Cephalopoda. Cephalopods are a group of molluscs that include the pearly chambered Nautilus, squids, and the octopus.

What are 4 examples of cephalopods?

10 Cephalopod Types Living in Oceans Worldwide

• Octopus.
• Squid.
• Nautilus.
• Cuttlefish.
• Vampire Squid.
• Flamboyant Cuttlefish.
• Telescope Octopus.
• Piglet Squid.

What is the purpose of chromatophores?

The primary function of the chromatophores is camouflage. They are used to match the brightness of the background and to produce components that help the animal achieve general resemblance to the substrate or break up the body’s outline.

What are the three basic types of mollusks?

The three major groups of mollusks are gastropods, bivalves, and cephalopods (SEF ul o pods). The largest group is the gastropods. These are mollusks like snails and slugs that have just one shell or no shell at all. Gastropods creep along on their broad foot.

Do humans have chromatophores?

Humans have only one class of pigment cell, the mammalian equivalent of melanophores, to generate skin, hair and eye colour. For this reason, and because the large number and contrasting colour of the cells usually make them very easy to visualise, melanophores are by far the most widely studied chromatophore.

Which is correct about cephalopoda?

plural noun. A large class of active predatory molluscs comprising octopuses, squids, and cuttlefish. ‘This section covers almost all of the Mollusca except the three huge clades of advanced mollusks: Bivalvia, Cephalopoda, and Gastropoda.

What is meant by chromatophore?

Medical Definition of chromatophore 1 : a pigment-bearing cell especially : a cell (such as a melanophore) of an animal integument capable of causing integumentary color changes by expanding or contracting. 2 : the organelle of photosynthesis in photosynthetic bacteria (as the cyanobacteria) : chromoplast, chloroplast.