Unlike humans who have a big brain and lots of nerves to send signals down the body, the hermit crab and other crustaceans have a much more primitive system. They have a primitive ventral nerve cord and ganglia system similar to an earthworm. Hermit Crabs have good vision thanks to their compound eyes on stalks (although can't look below them) and sensory organs are found on the body. Like true crabs, hermit crabs have bristles and hairs all over their body - but mostly on their walking legs - which act as touch receptors. The long antennae of hermit crabs - longer than other crabs - have smell sensors, used to find their food. Smell detectors are also found on the legs. When a hermit crab walks over food, its legs smell it, and the chelipeds quickly grasp it and move it into the mouth.
Yes. They have a brain and ganglions.
It is a part of the nervous system localized in the head of the animal. It is form by the retina, neurons and glial cells. Vision is its main function.
The nervous system The central nervous system
Crayfish have muscles. They need them to move.
No. Nervous System is comprised of the Central Nervous System (CNS) and the Peripheral Nervous System (PNS) The PNS is comprised of the Somatic Nervous System and the Autonomic Nervous System The Autonomic Nervous System is comprised of the Sympathetic Nervous System, the Parasympathetic Nervous System and the Enteric Nervous System
The Sympathetic Nervous System and the Parasympathetic Nervous System
peripheral nervous system
the peripheral nervous system
They are the central nervous system and the periperhal nervous system.but in the periperhal nervous system ,they are two nervous system divided,。
peripheral nervous system
Exoskeleton: Crayfish have a hard shell, and no bones. That makes crayfish invertebrates (no spine). Gills: Crayfish respire underwater through gills, where humans use lungs. The circulatory system is the second one, the reason for this being that crayfish have no blood vessels (and humans obviously do).
It functions using the nervous system that is connected to the brain. The sex cells are most commited although many people doubt this! this term is used for crayfish hi sp
The autonomic nervous system is a division of the central nervous system.