What does the term Cephalopoda mean?
: any of a class (Cephalopoda) of marine mollusks including the squids, cuttlefishes, and octopuses that move by expelling water from a tubular siphon under the head and that have a group of muscular usually sucker-bearing arms around the front of the head, highly developed eyes, and usually a sac containing ink which …
What mollusks belong to Cephalopoda?
Cephalopods are a group of molluscs that include the pearly chambered Nautilus, squids, and the octopus.
What does cephalopod mean in Greek?
Cephalopod literally means “head foot” in Greek, a reference to the way the cephalopod’s head connects to its many arms. The basic cephalopod body plan includes two eyes, a mantle, a funnel (also called a siphon), and at least eight arms.
What does Cephal mean in cephalopod?
The head, skull, or brain. Cephalopod. affix.
Is Cephalopodic a word?
(zoology) Belonging to, or resembling, the cephalopods.
Is not a characteristic of cephalopoda?
Excretory system – Cephalopods possess a single pair of large nephridia which produce nitrogenous waste and excrete it out from the body. Therefore, from the above discussion it has been clear that Sea squirt is not a cephalopod.
Why is Octopus grouped in cephalopoda?
Cephalopod literally means ‘head foot’ and members of this group, including octopuses, cuttlefishes, squids and nautiluses, have their foot or tentacles connected to their head, not their body. Cephalopods have the most advanced nervous system of all invertebrate animals and are active hunters.
What is the Latin meaning of the class cephalopoda?
cephalopod (n.) one of a class of mollusks notable for having tentacles attached to a distinct head, 1825, from French cephalopode, from Modern Latin Cephalopoda (the class name), from Greek kephalē “head” (see cephalo-) + pod-, stem of pous “foot” (from PIE root *ped- “foot”).
Why are cephalopods considered 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.
Is Cephal Greek or Latin?
Cephal- is a combining form used like a prefix meaning “head.” It is often used in medical and scientific terms. Cephal- comes from the Greek kephalḗ, meaning “head.”
What does the root Steth mean?
, steth- [Gr. stēthos, chest] Prefixes meaning chest.
What are the important characteristics of Mollusca?
One of the characteristics of mollusca is having a soft body and is protected by a hard shell that is bilaterally symmetrical.
What do cephalopods eat?
Cephalopods are a class of fast-swimming mollusk. Some have a hard external shell, but most do not. Cephalopods are marine predators; these carnivores eat fish, worms, crustaceans, and other mollusks. Some cephalopods include the octopus, squid, cuttlefish, nautilus, and ammonite (and other extinct animals).
Is a cephalopod a mollusk?
Cephalopods are a group of swimming mollusks, including the living squid, octopus, and the chambered Nautilus.
What are facts about mollusks?
Facts About Mollusks. Mollusks are interesting creatures that are found almost in all kinds of weathers with or without shells. Snails, squids, shellfish and their relatives belong to the mollusk group. Mollusks are soft-bodied invertebrates that have shells to protect them.