cephalopod nervous system

The nervous system emerges as distant ganglia, some of them merging and fusing later to form the cephalopod CNS (Figure 2C). As you might expect based on its skills in camouflage and avoiding predators, the octopus possesses a well-developed nervous system as well as complex sensory organs. Its eyes, for example, are similar to ours and possess an iris, pupil, lens and retina. “The cephalopod nervous system: what evolution has made of the molluscan design,” in The Nervous Systems of Invertebrates: An Evolutionary and Comparative Approach, eds O. Breidbach and W. Kutsch (Basel: Springer), 115–138. …system is attained by the cephalopods (squids, cuttlefishes, and octopuses) among the mollusks and by the insects and spiders among the arthropods. The octopus is excellent at spotting prey and reaching to just the right spot to snag it. The nervous system of cephalopods is the most complex of all invertebrates. Moreover, they have the well developed senses. The morphological and physiological adaptations that the cephalopod sensory organs and nervous system underwent during the course of evolution are briefly summarized. Cephalopod Nervous system. doi: 10.1007/978-3-0348-9219-3_7 Large brain; Information processing; Giant axons; Speed proportional to size; Stellate ganglia ensure coordinated, forceful contraction -> speed! Cephalopods (squid, octopus and cuttlefish) have the largest brain of all invertebrates, a distributed nervous system capable of instantaneous camouflage and sophisticated behaviors, a unique body plan, and the ability to extensively recode their own genetic information within messenger RNA, along with other distinctive features. Z. Cephalopods have large, well-developed brains, and their brain-to-body mass ratio is the largest among the invertebrates, falling between that of endothermic and ectothermic vertebrates.. This development of the brain is similar between cephalopod species although the timing of lobe formation and rearrangement … The nervous system of Cephalopods is more complex than the other invertebrates since the brain is larger than other members of grastropods. Cephalopod Sensory system. The core of the cephalopod circulatory system is a series of three beating hearts. Facts about Cephalopods 9: the nervous system. First, there is a high degree of… Brain size and structure. Cephalopoda Glossary A ventral view of this brain and the optic lobes can be found here . Young, the leading authority on the cephalopod nervous system in the latter half of the 20th century, divided the cephalopod brain into two regions: the supraesophageal mass and the subesophageal mass. J. The cartilaginous cranium protects the brain. Get facts about butterfly fish here. 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